1 /* 2 * Copyright (C) 2014 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS 24 * RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #define BTSTACK_FILE__ "hci.c" 39 40 /* 41 * hci.c 42 * 43 * Created by Matthias Ringwald on 4/29/09. 44 * 45 */ 46 47 #include "btstack_config.h" 48 49 50 #ifdef ENABLE_CLASSIC 51 #ifdef HAVE_EMBEDDED_TICK 52 #include "btstack_run_loop_embedded.h" 53 #endif 54 #endif 55 56 #ifdef HAVE_PLATFORM_IPHONE_OS 57 #include "../port/ios/src/btstack_control_iphone.h" 58 #endif 59 60 #ifdef ENABLE_BLE 61 #include "gap.h" 62 #include "ble/le_device_db.h" 63 #endif 64 65 #include <stdarg.h> 66 #include <string.h> 67 #include <inttypes.h> 68 69 #include "btstack_debug.h" 70 #include "btstack_event.h" 71 #include "btstack_linked_list.h" 72 #include "btstack_memory.h" 73 #include "bluetooth_company_id.h" 74 #include "bluetooth_data_types.h" 75 #include "gap.h" 76 #include "hci.h" 77 #include "hci_cmd.h" 78 #include "hci_dump.h" 79 #include "ad_parser.h" 80 81 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 82 #ifndef HCI_HOST_ACL_PACKET_NUM 83 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_NUM" 84 #endif 85 #ifndef HCI_HOST_ACL_PACKET_LEN 86 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_ACL_PACKET_LEN" 87 #endif 88 #ifndef HCI_HOST_SCO_PACKET_NUM 89 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_NUM" 90 #endif 91 #ifndef HCI_HOST_SCO_PACKET_LEN 92 #error "ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL requires to define HCI_HOST_SCO_PACKET_LEN" 93 #endif 94 #endif 95 96 #define HCI_CONNECTION_TIMEOUT_MS 10000 97 98 #ifndef HCI_RESET_RESEND_TIMEOUT_MS 99 #define HCI_RESET_RESEND_TIMEOUT_MS 200 100 #endif 101 102 // Names are arbitrarily shortened to 32 bytes if not requested otherwise 103 #ifndef GAP_INQUIRY_MAX_NAME_LEN 104 #define GAP_INQUIRY_MAX_NAME_LEN 32 105 #endif 106 107 // GAP inquiry state: 0 = off, 0x01 - 0x30 = requested duration, 0xfe = active, 0xff = stop requested 108 #define GAP_INQUIRY_DURATION_MIN 0x01 109 #define GAP_INQUIRY_DURATION_MAX 0x30 110 #define GAP_INQUIRY_STATE_ACTIVE 0x80 111 #define GAP_INQUIRY_STATE_IDLE 0 112 #define GAP_INQUIRY_STATE_W2_CANCEL 0x81 113 #define GAP_INQUIRY_STATE_W4_CANCELLED 0x82 114 115 // GAP Remote Name Request 116 #define GAP_REMOTE_NAME_STATE_IDLE 0 117 #define GAP_REMOTE_NAME_STATE_W2_SEND 1 118 #define GAP_REMOTE_NAME_STATE_W4_COMPLETE 2 119 120 // GAP Pairing 121 #define GAP_PAIRING_STATE_IDLE 0 122 #define GAP_PAIRING_STATE_SEND_PIN 1 123 #define GAP_PAIRING_STATE_SEND_PIN_NEGATIVE 2 124 #define GAP_PAIRING_STATE_SEND_PASSKEY 3 125 #define GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE 4 126 #define GAP_PAIRING_STATE_SEND_CONFIRMATION 5 127 #define GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE 6 128 129 130 // prototypes 131 #ifdef ENABLE_CLASSIC 132 static void hci_update_scan_enable(void); 133 static void hci_emit_discoverable_enabled(uint8_t enabled); 134 static int hci_local_ssp_activated(void); 135 static int hci_remote_ssp_supported(hci_con_handle_t con_handle); 136 static bool hci_ssp_supported(hci_connection_t * connection); 137 static void hci_notify_if_sco_can_send_now(void); 138 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status); 139 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection); 140 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level); 141 static void hci_connection_timeout_handler(btstack_timer_source_t *timer); 142 static void hci_connection_timestamp(hci_connection_t *connection); 143 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn); 144 static void gap_inquiry_explode(uint8_t *packet, uint16_t size); 145 #endif 146 147 static int hci_power_control_on(void); 148 static void hci_power_control_off(void); 149 static void hci_state_reset(void); 150 static void hci_emit_transport_packet_sent(void); 151 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason); 152 static void hci_emit_nr_connections_changed(void); 153 static void hci_emit_hci_open_failed(void); 154 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status); 155 static void hci_emit_event(uint8_t * event, uint16_t size, int dump); 156 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size); 157 static void hci_run(void); 158 static int hci_is_le_connection(hci_connection_t * connection); 159 static int hci_number_free_acl_slots_for_connection_type( bd_addr_type_t address_type); 160 161 #ifdef ENABLE_CLASSIC 162 static int hci_have_usb_transport(void); 163 #endif 164 165 #ifdef ENABLE_BLE 166 #ifdef ENABLE_LE_CENTRAL 167 // called from test/ble_client/advertising_data_parser.c 168 void le_handle_advertisement_report(uint8_t *packet, uint16_t size); 169 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address); 170 static hci_connection_t * gap_get_outgoing_connection(void); 171 #endif 172 #endif 173 174 // the STACK is here 175 #ifndef HAVE_MALLOC 176 static hci_stack_t hci_stack_static; 177 #endif 178 static hci_stack_t * hci_stack = NULL; 179 180 #ifdef ENABLE_CLASSIC 181 // default name 182 static const char * default_classic_name = "BTstack 00:00:00:00:00:00"; 183 184 // test helper 185 static uint8_t disable_l2cap_timeouts = 0; 186 #endif 187 188 /** 189 * create connection for given address 190 * 191 * @return connection OR NULL, if no memory left 192 */ 193 static hci_connection_t * create_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 194 log_info("create_connection_for_addr %s, type %x", bd_addr_to_str(addr), addr_type); 195 hci_connection_t * conn = btstack_memory_hci_connection_get(); 196 if (!conn) return NULL; 197 bd_addr_copy(conn->address, addr); 198 conn->role = HCI_ROLE_INVALID; 199 conn->address_type = addr_type; 200 conn->con_handle = 0xffff; 201 conn->authentication_flags = AUTH_FLAGS_NONE; 202 conn->bonding_flags = 0; 203 conn->requested_security_level = LEVEL_0; 204 #ifdef ENABLE_CLASSIC 205 conn->request_role = HCI_ROLE_INVALID; 206 btstack_run_loop_set_timer_handler(&conn->timeout, hci_connection_timeout_handler); 207 btstack_run_loop_set_timer_context(&conn->timeout, conn); 208 hci_connection_timestamp(conn); 209 #endif 210 conn->acl_recombination_length = 0; 211 conn->acl_recombination_pos = 0; 212 conn->num_packets_sent = 0; 213 214 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 215 #ifdef ENABLE_BLE 216 conn->le_phy_update_all_phys = 0xff; 217 #endif 218 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 219 conn->le_max_tx_octets = 27; 220 #endif 221 btstack_linked_list_add(&hci_stack->connections, (btstack_linked_item_t *) conn); 222 return conn; 223 } 224 225 226 /** 227 * get le connection parameter range 228 * 229 * @return le connection parameter range struct 230 */ 231 void gap_get_connection_parameter_range(le_connection_parameter_range_t * range){ 232 *range = hci_stack->le_connection_parameter_range; 233 } 234 235 /** 236 * set le connection parameter range 237 * 238 */ 239 240 void gap_set_connection_parameter_range(le_connection_parameter_range_t *range){ 241 hci_stack->le_connection_parameter_range = *range; 242 } 243 244 /** 245 * @brief Test if connection parameters are inside in existing rage 246 * @param conn_interval_min (unit: 1.25ms) 247 * @param conn_interval_max (unit: 1.25ms) 248 * @param conn_latency 249 * @param supervision_timeout (unit: 10ms) 250 * @returns 1 if included 251 */ 252 int gap_connection_parameter_range_included(le_connection_parameter_range_t * existing_range, uint16_t le_conn_interval_min, uint16_t le_conn_interval_max, uint16_t le_conn_latency, uint16_t le_supervision_timeout){ 253 if (le_conn_interval_min < existing_range->le_conn_interval_min) return 0; 254 if (le_conn_interval_max > existing_range->le_conn_interval_max) return 0; 255 256 if (le_conn_latency < existing_range->le_conn_latency_min) return 0; 257 if (le_conn_latency > existing_range->le_conn_latency_max) return 0; 258 259 if (le_supervision_timeout < existing_range->le_supervision_timeout_min) return 0; 260 if (le_supervision_timeout > existing_range->le_supervision_timeout_max) return 0; 261 262 return 1; 263 } 264 265 /** 266 * @brief Set max number of connections in LE Peripheral role (if Bluetooth Controller supports it) 267 * @note: default: 1 268 * @param max_peripheral_connections 269 */ 270 #ifdef ENABLE_LE_PERIPHERAL 271 void gap_set_max_number_peripheral_connections(int max_peripheral_connections){ 272 hci_stack->le_max_number_peripheral_connections = max_peripheral_connections; 273 } 274 #endif 275 276 /** 277 * get hci connections iterator 278 * 279 * @return hci connections iterator 280 */ 281 282 void hci_connections_get_iterator(btstack_linked_list_iterator_t *it){ 283 btstack_linked_list_iterator_init(it, &hci_stack->connections); 284 } 285 286 /** 287 * get connection for a given handle 288 * 289 * @return connection OR NULL, if not found 290 */ 291 hci_connection_t * hci_connection_for_handle(hci_con_handle_t con_handle){ 292 btstack_linked_list_iterator_t it; 293 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 294 while (btstack_linked_list_iterator_has_next(&it)){ 295 hci_connection_t * item = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 296 if ( item->con_handle == con_handle ) { 297 return item; 298 } 299 } 300 return NULL; 301 } 302 303 /** 304 * get connection for given address 305 * 306 * @return connection OR NULL, if not found 307 */ 308 hci_connection_t * hci_connection_for_bd_addr_and_type(const bd_addr_t addr, bd_addr_type_t addr_type){ 309 btstack_linked_list_iterator_t it; 310 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 311 while (btstack_linked_list_iterator_has_next(&it)){ 312 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 313 if (connection->address_type != addr_type) continue; 314 if (memcmp(addr, connection->address, 6) != 0) continue; 315 return connection; 316 } 317 return NULL; 318 } 319 320 inline static void connectionClearAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 321 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags & ~flags); 322 } 323 324 inline static void connectionSetAuthenticationFlags(hci_connection_t * conn, hci_authentication_flags_t flags){ 325 conn->authentication_flags = (hci_authentication_flags_t)(conn->authentication_flags | flags); 326 } 327 328 #ifdef ENABLE_CLASSIC 329 330 #ifdef ENABLE_SCO_OVER_HCI 331 static int hci_number_sco_connections(void){ 332 int connections = 0; 333 btstack_linked_list_iterator_t it; 334 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 335 while (btstack_linked_list_iterator_has_next(&it)){ 336 hci_connection_t * connection = (hci_connection_t *) btstack_linked_list_iterator_next(&it); 337 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 338 connections++; 339 } 340 return connections; 341 } 342 #endif 343 344 static void hci_connection_timeout_handler(btstack_timer_source_t *timer){ 345 hci_connection_t * connection = (hci_connection_t *) btstack_run_loop_get_timer_context(timer); 346 #ifdef HAVE_EMBEDDED_TICK 347 if (btstack_run_loop_embedded_get_ticks() > connection->timestamp + btstack_run_loop_embedded_ticks_for_ms(HCI_CONNECTION_TIMEOUT_MS)){ 348 // connections might be timed out 349 hci_emit_l2cap_check_timeout(connection); 350 } 351 #else 352 if (btstack_run_loop_get_time_ms() > (connection->timestamp + HCI_CONNECTION_TIMEOUT_MS)){ 353 // connections might be timed out 354 hci_emit_l2cap_check_timeout(connection); 355 } 356 #endif 357 } 358 359 static void hci_connection_timestamp(hci_connection_t *connection){ 360 #ifdef HAVE_EMBEDDED_TICK 361 connection->timestamp = btstack_run_loop_embedded_get_ticks(); 362 #else 363 connection->timestamp = btstack_run_loop_get_time_ms(); 364 #endif 365 } 366 367 /** 368 * add authentication flags and reset timer 369 * @note: assumes classic connection 370 * @note: bd_addr is passed in as litle endian uint8_t * as it is called from parsing packets 371 */ 372 static void hci_add_connection_flags_for_flipped_bd_addr(uint8_t *bd_addr, hci_authentication_flags_t flags){ 373 bd_addr_t addr; 374 reverse_bd_addr(bd_addr, addr); 375 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 376 if (conn) { 377 connectionSetAuthenticationFlags(conn, flags); 378 hci_connection_timestamp(conn); 379 } 380 } 381 382 int hci_authentication_active_for_handle(hci_con_handle_t handle){ 383 hci_connection_t * conn = hci_connection_for_handle(handle); 384 if (!conn) return 0; 385 if (conn->authentication_flags & LEGACY_PAIRING_ACTIVE) return 1; 386 if (conn->authentication_flags & SSP_PAIRING_ACTIVE) return 1; 387 return 0; 388 } 389 390 void gap_drop_link_key_for_bd_addr(bd_addr_t addr){ 391 if (!hci_stack->link_key_db) return; 392 log_info("gap_drop_link_key_for_bd_addr: %s", bd_addr_to_str(addr)); 393 hci_stack->link_key_db->delete_link_key(addr); 394 } 395 396 void gap_store_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t type){ 397 if (!hci_stack->link_key_db) return; 398 log_info("gap_store_link_key_for_bd_addr: %s, type %u", bd_addr_to_str(addr), type); 399 hci_stack->link_key_db->put_link_key(addr, link_key, type); 400 } 401 402 bool gap_get_link_key_for_bd_addr(bd_addr_t addr, link_key_t link_key, link_key_type_t * type){ 403 if (!hci_stack->link_key_db) return false; 404 int result = hci_stack->link_key_db->get_link_key(addr, link_key, type) != 0; 405 log_info("link key for %s available %u, type %u", bd_addr_to_str(addr), result, (int) *type); 406 return result; 407 } 408 409 void gap_delete_all_link_keys(void){ 410 bd_addr_t addr; 411 link_key_t link_key; 412 link_key_type_t type; 413 btstack_link_key_iterator_t it; 414 int ok = gap_link_key_iterator_init(&it); 415 if (!ok) { 416 log_error("could not initialize iterator"); 417 return; 418 } 419 while (gap_link_key_iterator_get_next(&it, addr, link_key, &type)){ 420 gap_drop_link_key_for_bd_addr(addr); 421 } 422 gap_link_key_iterator_done(&it); 423 } 424 425 int gap_link_key_iterator_init(btstack_link_key_iterator_t * it){ 426 if (!hci_stack->link_key_db) return 0; 427 if (!hci_stack->link_key_db->iterator_init) return 0; 428 return hci_stack->link_key_db->iterator_init(it); 429 } 430 int gap_link_key_iterator_get_next(btstack_link_key_iterator_t * it, bd_addr_t bd_addr, link_key_t link_key, link_key_type_t * type){ 431 if (!hci_stack->link_key_db) return 0; 432 return hci_stack->link_key_db->iterator_get_next(it, bd_addr, link_key, type); 433 } 434 void gap_link_key_iterator_done(btstack_link_key_iterator_t * it){ 435 if (!hci_stack->link_key_db) return; 436 hci_stack->link_key_db->iterator_done(it); 437 } 438 #endif 439 440 static bool hci_is_le_connection_type(bd_addr_type_t address_type){ 441 switch (address_type){ 442 case BD_ADDR_TYPE_LE_PUBLIC: 443 case BD_ADDR_TYPE_LE_RANDOM: 444 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_PUBLIC: 445 case BD_ADDR_TYPE_LE_PRIVAT_FALLBACK_RANDOM: 446 return true; 447 default: 448 return false; 449 } 450 } 451 452 static int hci_is_le_connection(hci_connection_t * connection){ 453 return hci_is_le_connection_type(connection->address_type); 454 } 455 456 /** 457 * count connections 458 */ 459 static int nr_hci_connections(void){ 460 int count = 0; 461 btstack_linked_item_t *it; 462 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL ; it = it->next){ 463 count++; 464 } 465 return count; 466 } 467 468 static int hci_number_free_acl_slots_for_connection_type(bd_addr_type_t address_type){ 469 470 unsigned int num_packets_sent_classic = 0; 471 unsigned int num_packets_sent_le = 0; 472 473 btstack_linked_item_t *it; 474 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 475 hci_connection_t * connection = (hci_connection_t *) it; 476 if (hci_is_le_connection(connection)){ 477 num_packets_sent_le += connection->num_packets_sent; 478 } 479 if (connection->address_type == BD_ADDR_TYPE_ACL){ 480 num_packets_sent_classic += connection->num_packets_sent; 481 } 482 } 483 log_debug("ACL classic buffers: %u used of %u", num_packets_sent_classic, hci_stack->acl_packets_total_num); 484 int free_slots_classic = hci_stack->acl_packets_total_num - num_packets_sent_classic; 485 int free_slots_le = 0; 486 487 if (free_slots_classic < 0){ 488 log_error("hci_number_free_acl_slots: outgoing classic packets (%u) > total classic packets (%u)", num_packets_sent_classic, hci_stack->acl_packets_total_num); 489 return 0; 490 } 491 492 if (hci_stack->le_acl_packets_total_num){ 493 // if we have LE slots, they are used 494 free_slots_le = hci_stack->le_acl_packets_total_num - num_packets_sent_le; 495 if (free_slots_le < 0){ 496 log_error("hci_number_free_acl_slots: outgoing le packets (%u) > total le packets (%u)", num_packets_sent_le, hci_stack->le_acl_packets_total_num); 497 return 0; 498 } 499 } else { 500 // otherwise, classic slots are used for LE, too 501 free_slots_classic -= num_packets_sent_le; 502 if (free_slots_classic < 0){ 503 log_error("hci_number_free_acl_slots: outgoing classic + le packets (%u + %u) > total packets (%u)", num_packets_sent_classic, num_packets_sent_le, hci_stack->acl_packets_total_num); 504 return 0; 505 } 506 } 507 508 switch (address_type){ 509 case BD_ADDR_TYPE_UNKNOWN: 510 log_error("hci_number_free_acl_slots: unknown address type"); 511 return 0; 512 513 case BD_ADDR_TYPE_ACL: 514 return free_slots_classic; 515 516 default: 517 if (hci_stack->le_acl_packets_total_num){ 518 return free_slots_le; 519 } 520 return free_slots_classic; 521 } 522 } 523 524 int hci_number_free_acl_slots_for_handle(hci_con_handle_t con_handle){ 525 // get connection type 526 hci_connection_t * connection = hci_connection_for_handle(con_handle); 527 if (!connection){ 528 log_error("hci_number_free_acl_slots: handle 0x%04x not in connection list", con_handle); 529 return 0; 530 } 531 return hci_number_free_acl_slots_for_connection_type(connection->address_type); 532 } 533 534 #ifdef ENABLE_CLASSIC 535 static int hci_number_free_sco_slots(void){ 536 unsigned int num_sco_packets_sent = 0; 537 btstack_linked_item_t *it; 538 if (hci_stack->synchronous_flow_control_enabled){ 539 // explicit flow control 540 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 541 hci_connection_t * connection = (hci_connection_t *) it; 542 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 543 num_sco_packets_sent += connection->num_packets_sent; 544 } 545 if (num_sco_packets_sent > hci_stack->sco_packets_total_num){ 546 log_info("hci_number_free_sco_slots:packets (%u) > total packets (%u)", num_sco_packets_sent, hci_stack->sco_packets_total_num); 547 return 0; 548 } 549 return hci_stack->sco_packets_total_num - num_sco_packets_sent; 550 } else { 551 // implicit flow control -- TODO 552 int num_ready = 0; 553 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 554 hci_connection_t * connection = (hci_connection_t *) it; 555 if (connection->address_type != BD_ADDR_TYPE_SCO) continue; 556 if (connection->sco_tx_ready == 0) continue; 557 num_ready++; 558 } 559 return num_ready; 560 } 561 } 562 #endif 563 564 // only used to send HCI Host Number Completed Packets 565 static int hci_can_send_comand_packet_transport(void){ 566 if (hci_stack->hci_packet_buffer_reserved) return 0; 567 568 // check for async hci transport implementations 569 if (hci_stack->hci_transport->can_send_packet_now){ 570 if (!hci_stack->hci_transport->can_send_packet_now(HCI_COMMAND_DATA_PACKET)){ 571 return 0; 572 } 573 } 574 return 1; 575 } 576 577 // new functions replacing hci_can_send_packet_now[_using_packet_buffer] 578 int hci_can_send_command_packet_now(void){ 579 if (hci_can_send_comand_packet_transport() == 0) return 0; 580 return hci_stack->num_cmd_packets > 0u; 581 } 582 583 static int hci_transport_can_send_prepared_packet_now(uint8_t packet_type){ 584 // check for async hci transport implementations 585 if (!hci_stack->hci_transport->can_send_packet_now) return 1; 586 return hci_stack->hci_transport->can_send_packet_now(packet_type); 587 } 588 589 static int hci_can_send_prepared_acl_packet_for_address_type(bd_addr_type_t address_type){ 590 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 591 return hci_number_free_acl_slots_for_connection_type(address_type) > 0; 592 } 593 594 int hci_can_send_acl_le_packet_now(void){ 595 if (hci_stack->hci_packet_buffer_reserved) return 0; 596 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_LE_PUBLIC); 597 } 598 599 int hci_can_send_prepared_acl_packet_now(hci_con_handle_t con_handle) { 600 if (!hci_transport_can_send_prepared_packet_now(HCI_ACL_DATA_PACKET)) return 0; 601 return hci_number_free_acl_slots_for_handle(con_handle) > 0; 602 } 603 604 int hci_can_send_acl_packet_now(hci_con_handle_t con_handle){ 605 if (hci_stack->hci_packet_buffer_reserved) return 0; 606 return hci_can_send_prepared_acl_packet_now(con_handle); 607 } 608 609 #ifdef ENABLE_CLASSIC 610 int hci_can_send_acl_classic_packet_now(void){ 611 if (hci_stack->hci_packet_buffer_reserved) return 0; 612 return hci_can_send_prepared_acl_packet_for_address_type(BD_ADDR_TYPE_ACL); 613 } 614 615 int hci_can_send_prepared_sco_packet_now(void){ 616 if (!hci_transport_can_send_prepared_packet_now(HCI_SCO_DATA_PACKET)) return 0; 617 if (hci_have_usb_transport()){ 618 return hci_stack->sco_can_send_now; 619 } else { 620 return hci_number_free_sco_slots() > 0; 621 } 622 } 623 624 int hci_can_send_sco_packet_now(void){ 625 if (hci_stack->hci_packet_buffer_reserved) return 0; 626 return hci_can_send_prepared_sco_packet_now(); 627 } 628 629 void hci_request_sco_can_send_now_event(void){ 630 hci_stack->sco_waiting_for_can_send_now = 1; 631 hci_notify_if_sco_can_send_now(); 632 } 633 #endif 634 635 // used for internal checks in l2cap.c 636 int hci_is_packet_buffer_reserved(void){ 637 return hci_stack->hci_packet_buffer_reserved; 638 } 639 640 // reserves outgoing packet buffer. @returns 1 if successful 641 int hci_reserve_packet_buffer(void){ 642 if (hci_stack->hci_packet_buffer_reserved) { 643 log_error("hci_reserve_packet_buffer called but buffer already reserved"); 644 return 0; 645 } 646 hci_stack->hci_packet_buffer_reserved = 1; 647 return 1; 648 } 649 650 void hci_release_packet_buffer(void){ 651 hci_stack->hci_packet_buffer_reserved = 0; 652 } 653 654 // assumption: synchronous implementations don't provide can_send_packet_now as they don't keep the buffer after the call 655 static int hci_transport_synchronous(void){ 656 return hci_stack->hci_transport->can_send_packet_now == NULL; 657 } 658 659 static int hci_send_acl_packet_fragments(hci_connection_t *connection){ 660 661 // log_info("hci_send_acl_packet_fragments %u/%u (con 0x%04x)", hci_stack->acl_fragmentation_pos, hci_stack->acl_fragmentation_total_size, connection->con_handle); 662 663 // max ACL data packet length depends on connection type (LE vs. Classic) and available buffers 664 uint16_t max_acl_data_packet_length = hci_stack->acl_data_packet_length; 665 if (hci_is_le_connection(connection) && (hci_stack->le_data_packets_length > 0u)){ 666 max_acl_data_packet_length = hci_stack->le_data_packets_length; 667 } 668 669 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 670 if (hci_is_le_connection(connection)){ 671 max_acl_data_packet_length = connection->le_max_tx_octets; 672 } 673 #endif 674 675 log_debug("hci_send_acl_packet_fragments entered"); 676 677 int err; 678 // multiple packets could be send on a synchronous HCI transport 679 while (true){ 680 681 log_debug("hci_send_acl_packet_fragments loop entered"); 682 683 // get current data 684 const uint16_t acl_header_pos = hci_stack->acl_fragmentation_pos - 4u; 685 int current_acl_data_packet_length = hci_stack->acl_fragmentation_total_size - hci_stack->acl_fragmentation_pos; 686 bool more_fragments = false; 687 688 // if ACL packet is larger than Bluetooth packet buffer, only send max_acl_data_packet_length 689 if (current_acl_data_packet_length > max_acl_data_packet_length){ 690 more_fragments = true; 691 current_acl_data_packet_length = max_acl_data_packet_length; 692 } 693 694 // copy handle_and_flags if not first fragment and update packet boundary flags to be 01 (continuing fragmnent) 695 if (acl_header_pos > 0u){ 696 uint16_t handle_and_flags = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 697 handle_and_flags = (handle_and_flags & 0xcfffu) | (1u << 12u); 698 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos, handle_and_flags); 699 } 700 701 // update header len 702 little_endian_store_16(hci_stack->hci_packet_buffer, acl_header_pos + 2u, current_acl_data_packet_length); 703 704 // count packet 705 connection->num_packets_sent++; 706 log_debug("hci_send_acl_packet_fragments loop before send (more fragments %d)", (int) more_fragments); 707 708 // update state for next fragment (if any) as "transport done" might be sent during send_packet already 709 if (more_fragments){ 710 // update start of next fragment to send 711 hci_stack->acl_fragmentation_pos += current_acl_data_packet_length; 712 } else { 713 // done 714 hci_stack->acl_fragmentation_pos = 0; 715 hci_stack->acl_fragmentation_total_size = 0; 716 } 717 718 // send packet 719 uint8_t * packet = &hci_stack->hci_packet_buffer[acl_header_pos]; 720 const int size = current_acl_data_packet_length + 4; 721 hci_dump_packet(HCI_ACL_DATA_PACKET, 0, packet, size); 722 hci_stack->acl_fragmentation_tx_active = 1; 723 err = hci_stack->hci_transport->send_packet(HCI_ACL_DATA_PACKET, packet, size); 724 725 log_debug("hci_send_acl_packet_fragments loop after send (more fragments %d)", (int) more_fragments); 726 727 // done yet? 728 if (!more_fragments) break; 729 730 // can send more? 731 if (!hci_can_send_prepared_acl_packet_now(connection->con_handle)) return err; 732 } 733 734 log_debug("hci_send_acl_packet_fragments loop over"); 735 736 // release buffer now for synchronous transport 737 if (hci_transport_synchronous()){ 738 hci_stack->acl_fragmentation_tx_active = 0; 739 hci_release_packet_buffer(); 740 hci_emit_transport_packet_sent(); 741 } 742 743 return err; 744 } 745 746 // pre: caller has reserved the packet buffer 747 int hci_send_acl_packet_buffer(int size){ 748 749 // log_info("hci_send_acl_packet_buffer size %u", size); 750 751 if (!hci_stack->hci_packet_buffer_reserved) { 752 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 753 return 0; 754 } 755 756 uint8_t * packet = hci_stack->hci_packet_buffer; 757 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 758 759 // check for free places on Bluetooth module 760 if (!hci_can_send_prepared_acl_packet_now(con_handle)) { 761 log_error("hci_send_acl_packet_buffer called but no free ACL buffers on controller"); 762 hci_release_packet_buffer(); 763 hci_emit_transport_packet_sent(); 764 return BTSTACK_ACL_BUFFERS_FULL; 765 } 766 767 hci_connection_t *connection = hci_connection_for_handle( con_handle); 768 if (!connection) { 769 log_error("hci_send_acl_packet_buffer called but no connection for handle 0x%04x", con_handle); 770 hci_release_packet_buffer(); 771 hci_emit_transport_packet_sent(); 772 return 0; 773 } 774 775 #ifdef ENABLE_CLASSIC 776 hci_connection_timestamp(connection); 777 #endif 778 779 // hci_dump_packet( HCI_ACL_DATA_PACKET, 0, packet, size); 780 781 // setup data 782 hci_stack->acl_fragmentation_total_size = size; 783 hci_stack->acl_fragmentation_pos = 4; // start of L2CAP packet 784 785 return hci_send_acl_packet_fragments(connection); 786 } 787 788 #ifdef ENABLE_CLASSIC 789 // pre: caller has reserved the packet buffer 790 int hci_send_sco_packet_buffer(int size){ 791 792 // log_info("hci_send_acl_packet_buffer size %u", size); 793 794 if (!hci_stack->hci_packet_buffer_reserved) { 795 log_error("hci_send_acl_packet_buffer called without reserving packet buffer"); 796 return 0; 797 } 798 799 uint8_t * packet = hci_stack->hci_packet_buffer; 800 801 // skip checks in loopback mode 802 if (!hci_stack->loopback_mode){ 803 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); // same for ACL and SCO 804 805 // check for free places on Bluetooth module 806 if (!hci_can_send_prepared_sco_packet_now()) { 807 log_error("hci_send_sco_packet_buffer called but no free SCO buffers on controller"); 808 hci_release_packet_buffer(); 809 hci_emit_transport_packet_sent(); 810 return BTSTACK_ACL_BUFFERS_FULL; 811 } 812 813 // track send packet in connection struct 814 hci_connection_t *connection = hci_connection_for_handle( con_handle); 815 if (!connection) { 816 log_error("hci_send_sco_packet_buffer called but no connection for handle 0x%04x", con_handle); 817 hci_release_packet_buffer(); 818 hci_emit_transport_packet_sent(); 819 return 0; 820 } 821 822 if (hci_have_usb_transport()){ 823 // token used 824 hci_stack->sco_can_send_now = 0; 825 } else { 826 if (hci_stack->synchronous_flow_control_enabled){ 827 connection->num_packets_sent++; 828 } else { 829 connection->sco_tx_ready--; 830 } 831 } 832 } 833 834 hci_dump_packet( HCI_SCO_DATA_PACKET, 0, packet, size); 835 int err = hci_stack->hci_transport->send_packet(HCI_SCO_DATA_PACKET, packet, size); 836 837 if (hci_transport_synchronous()){ 838 hci_release_packet_buffer(); 839 hci_emit_transport_packet_sent(); 840 } 841 842 return err; 843 } 844 #endif 845 846 static void acl_handler(uint8_t *packet, uint16_t size){ 847 848 // get info 849 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(packet); 850 hci_connection_t *conn = hci_connection_for_handle(con_handle); 851 uint8_t acl_flags = READ_ACL_FLAGS(packet); 852 uint16_t acl_length = READ_ACL_LENGTH(packet); 853 854 // ignore non-registered handle 855 if (!conn){ 856 log_error("acl_handler called with non-registered handle %u!" , con_handle); 857 return; 858 } 859 860 // assert packet is complete 861 if ((acl_length + 4u) != size){ 862 log_error("acl_handler called with ACL packet of wrong size %d, expected %u => dropping packet", size, acl_length + 4); 863 return; 864 } 865 866 #ifdef ENABLE_CLASSIC 867 // update idle timestamp 868 hci_connection_timestamp(conn); 869 #endif 870 871 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 872 hci_stack->host_completed_packets = 1; 873 conn->num_packets_completed++; 874 #endif 875 876 // handle different packet types 877 switch (acl_flags & 0x03u) { 878 879 case 0x01: // continuation fragment 880 881 // sanity checks 882 if (conn->acl_recombination_pos == 0u) { 883 log_error( "ACL Cont Fragment but no first fragment for handle 0x%02x", con_handle); 884 return; 885 } 886 if ((conn->acl_recombination_pos + acl_length) > (4u + HCI_ACL_BUFFER_SIZE)){ 887 log_error( "ACL Cont Fragment to large: combined packet %u > buffer size %u for handle 0x%02x", 888 conn->acl_recombination_pos + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 889 conn->acl_recombination_pos = 0; 890 return; 891 } 892 893 // append fragment payload (header already stored) 894 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE + conn->acl_recombination_pos], 895 &packet[4], acl_length); 896 conn->acl_recombination_pos += acl_length; 897 898 // forward complete L2CAP packet if complete. 899 if (conn->acl_recombination_pos >= (conn->acl_recombination_length + 4u + 4u)){ // pos already incl. ACL header 900 hci_emit_acl_packet(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], conn->acl_recombination_pos); 901 // reset recombination buffer 902 conn->acl_recombination_length = 0; 903 conn->acl_recombination_pos = 0; 904 } 905 break; 906 907 case 0x02: { // first fragment 908 909 // sanity check 910 if (conn->acl_recombination_pos) { 911 log_error( "ACL First Fragment but data in buffer for handle 0x%02x, dropping stale fragments", con_handle); 912 conn->acl_recombination_pos = 0; 913 } 914 915 // peek into L2CAP packet! 916 uint16_t l2cap_length = READ_L2CAP_LENGTH( packet ); 917 918 // compare fragment size to L2CAP packet size 919 if (acl_length >= (l2cap_length + 4u)){ 920 // forward fragment as L2CAP packet 921 hci_emit_acl_packet(packet, acl_length + 4u); 922 } else { 923 924 if (acl_length > HCI_ACL_BUFFER_SIZE){ 925 log_error( "ACL First Fragment to large: fragment %u > buffer size %u for handle 0x%02x", 926 4 + acl_length, 4 + HCI_ACL_BUFFER_SIZE, con_handle); 927 return; 928 } 929 930 // store first fragment and tweak acl length for complete package 931 (void)memcpy(&conn->acl_recombination_buffer[HCI_INCOMING_PRE_BUFFER_SIZE], 932 packet, acl_length + 4u); 933 conn->acl_recombination_pos = acl_length + 4u; 934 conn->acl_recombination_length = l2cap_length; 935 little_endian_store_16(conn->acl_recombination_buffer, HCI_INCOMING_PRE_BUFFER_SIZE + 2u, l2cap_length +4u); 936 } 937 break; 938 939 } 940 default: 941 log_error( "acl_handler called with invalid packet boundary flags %u", acl_flags & 0x03); 942 return; 943 } 944 945 // execute main loop 946 hci_run(); 947 } 948 949 static void hci_shutdown_connection(hci_connection_t *conn){ 950 log_info("Connection closed: handle 0x%x, %s", conn->con_handle, bd_addr_to_str(conn->address)); 951 952 #ifdef ENABLE_CLASSIC 953 #ifdef ENABLE_SCO_OVER_HCI 954 int addr_type = conn->address_type; 955 #endif 956 #endif 957 958 btstack_run_loop_remove_timer(&conn->timeout); 959 960 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 961 btstack_memory_hci_connection_free( conn ); 962 963 // now it's gone 964 hci_emit_nr_connections_changed(); 965 966 #ifdef ENABLE_CLASSIC 967 #ifdef ENABLE_SCO_OVER_HCI 968 // update SCO 969 if (addr_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 970 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 971 } 972 #endif 973 #endif 974 } 975 976 #ifdef ENABLE_CLASSIC 977 978 static const uint16_t packet_type_sizes[] = { 979 0, HCI_ACL_2DH1_SIZE, HCI_ACL_3DH1_SIZE, HCI_ACL_DM1_SIZE, 980 HCI_ACL_DH1_SIZE, 0, 0, 0, 981 HCI_ACL_2DH3_SIZE, HCI_ACL_3DH3_SIZE, HCI_ACL_DM3_SIZE, HCI_ACL_DH3_SIZE, 982 HCI_ACL_2DH5_SIZE, HCI_ACL_3DH5_SIZE, HCI_ACL_DM5_SIZE, HCI_ACL_DH5_SIZE 983 }; 984 static const uint8_t packet_type_feature_requirement_bit[] = { 985 0, // 3 slot packets 986 1, // 5 slot packets 987 25, // EDR 2 mpbs 988 26, // EDR 3 mbps 989 39, // 3 slot EDR packts 990 40, // 5 slot EDR packet 991 }; 992 static const uint16_t packet_type_feature_packet_mask[] = { 993 0x0f00, // 3 slot packets 994 0xf000, // 5 slot packets 995 0x1102, // EDR 2 mpbs 996 0x2204, // EDR 3 mbps 997 0x0300, // 3 slot EDR packts 998 0x3000, // 5 slot EDR packet 999 }; 1000 1001 static uint16_t hci_acl_packet_types_for_buffer_size_and_local_features(uint16_t buffer_size, uint8_t * local_supported_features){ 1002 // enable packet types based on size 1003 uint16_t packet_types = 0; 1004 unsigned int i; 1005 for (i=0;i<16;i++){ 1006 if (packet_type_sizes[i] == 0) continue; 1007 if (packet_type_sizes[i] <= buffer_size){ 1008 packet_types |= 1 << i; 1009 } 1010 } 1011 // disable packet types due to missing local supported features 1012 for (i=0;i<sizeof(packet_type_feature_requirement_bit);i++){ 1013 unsigned int bit_idx = packet_type_feature_requirement_bit[i]; 1014 int feature_set = (local_supported_features[bit_idx >> 3] & (1<<(bit_idx & 7))) != 0; 1015 if (feature_set) continue; 1016 log_info("Features bit %02u is not set, removing packet types 0x%04x", bit_idx, packet_type_feature_packet_mask[i]); 1017 packet_types &= ~packet_type_feature_packet_mask[i]; 1018 } 1019 // flip bits for "may not be used" 1020 packet_types ^= 0x3306; 1021 return packet_types; 1022 } 1023 1024 uint16_t hci_usable_acl_packet_types(void){ 1025 return hci_stack->packet_types; 1026 } 1027 #endif 1028 1029 uint8_t* hci_get_outgoing_packet_buffer(void){ 1030 // hci packet buffer is >= acl data packet length 1031 return hci_stack->hci_packet_buffer; 1032 } 1033 1034 uint16_t hci_max_acl_data_packet_length(void){ 1035 return hci_stack->acl_data_packet_length; 1036 } 1037 1038 #ifdef ENABLE_CLASSIC 1039 int hci_extended_sco_link_supported(void){ 1040 // No. 31, byte 3, bit 7 1041 return (hci_stack->local_supported_features[3] & (1 << 7)) != 0; 1042 } 1043 #endif 1044 1045 int hci_non_flushable_packet_boundary_flag_supported(void){ 1046 // No. 54, byte 6, bit 6 1047 return (hci_stack->local_supported_features[6u] & (1u << 6u)) != 0u; 1048 } 1049 1050 static int gap_ssp_supported(void){ 1051 // No. 51, byte 6, bit 3 1052 return (hci_stack->local_supported_features[6u] & (1u << 3u)) != 0u; 1053 } 1054 1055 static int hci_classic_supported(void){ 1056 #ifdef ENABLE_CLASSIC 1057 // No. 37, byte 4, bit 5, = No BR/EDR Support 1058 return (hci_stack->local_supported_features[4] & (1 << 5)) == 0; 1059 #else 1060 return 0; 1061 #endif 1062 } 1063 1064 static int hci_le_supported(void){ 1065 #ifdef ENABLE_BLE 1066 // No. 37, byte 4, bit 6 = LE Supported (Controller) 1067 return (hci_stack->local_supported_features[4u] & (1u << 6u)) != 0u; 1068 #else 1069 return 0; 1070 #endif 1071 } 1072 1073 #ifdef ENABLE_BLE 1074 1075 /** 1076 * @brief Get addr type and address used for LE in Advertisements, Scan Responses, 1077 */ 1078 void gap_le_get_own_address(uint8_t * addr_type, bd_addr_t addr){ 1079 *addr_type = hci_stack->le_own_addr_type; 1080 if (hci_stack->le_own_addr_type){ 1081 (void)memcpy(addr, hci_stack->le_random_address, 6); 1082 } else { 1083 (void)memcpy(addr, hci_stack->local_bd_addr, 6); 1084 } 1085 } 1086 1087 #ifdef ENABLE_LE_CENTRAL 1088 void le_handle_advertisement_report(uint8_t *packet, uint16_t size){ 1089 1090 int offset = 3; 1091 int num_reports = packet[offset]; 1092 offset += 1; 1093 1094 int i; 1095 // log_info("HCI: handle adv report with num reports: %d", num_reports); 1096 uint8_t event[12 + LE_ADVERTISING_DATA_SIZE]; // use upper bound to avoid var size automatic var 1097 for (i=0; (i<num_reports) && (offset < size);i++){ 1098 // sanity checks on data_length: 1099 uint8_t data_length = packet[offset + 8]; 1100 if (data_length > LE_ADVERTISING_DATA_SIZE) return; 1101 if ((offset + 9u + data_length + 1u) > size) return; 1102 // setup event 1103 uint8_t event_size = 10u + data_length; 1104 int pos = 0; 1105 event[pos++] = GAP_EVENT_ADVERTISING_REPORT; 1106 event[pos++] = event_size; 1107 (void)memcpy(&event[pos], &packet[offset], 1 + 1 + 6); // event type + address type + address 1108 offset += 8; 1109 pos += 8; 1110 event[pos++] = packet[offset + 1 + data_length]; // rssi 1111 event[pos++] = data_length; 1112 offset++; 1113 (void)memcpy(&event[pos], &packet[offset], data_length); 1114 pos += data_length; 1115 offset += data_length + 1u; // rssi 1116 hci_emit_event(event, pos, 1); 1117 } 1118 } 1119 #endif 1120 #endif 1121 1122 #ifdef ENABLE_BLE 1123 #ifdef ENABLE_LE_PERIPHERAL 1124 static void hci_update_advertisements_enabled_for_current_roles(void){ 1125 if (hci_stack->le_advertisements_enabled){ 1126 // get number of active le slave connections 1127 int num_slave_connections = 0; 1128 btstack_linked_list_iterator_t it; 1129 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 1130 while (btstack_linked_list_iterator_has_next(&it)){ 1131 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 1132 log_info("state %u, role %u, le_con %u", con->state, con->role, hci_is_le_connection(con)); 1133 if (con->state != OPEN) continue; 1134 if (con->role != HCI_ROLE_SLAVE) continue; 1135 if (!hci_is_le_connection(con)) continue; 1136 num_slave_connections++; 1137 } 1138 log_info("Num LE Peripheral roles: %u of %u", num_slave_connections, hci_stack->le_max_number_peripheral_connections); 1139 hci_stack->le_advertisements_enabled_for_current_roles = num_slave_connections < hci_stack->le_max_number_peripheral_connections; 1140 } else { 1141 hci_stack->le_advertisements_enabled_for_current_roles = false; 1142 } 1143 } 1144 #endif 1145 #endif 1146 1147 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1148 1149 static uint32_t hci_transport_uart_get_main_baud_rate(void){ 1150 if (!hci_stack->config) return 0; 1151 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1152 // Limit baud rate for Broadcom chipsets to 3 mbps 1153 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) && (baud_rate > 3000000)){ 1154 baud_rate = 3000000; 1155 } 1156 return baud_rate; 1157 } 1158 1159 static void hci_initialization_timeout_handler(btstack_timer_source_t * ds){ 1160 UNUSED(ds); 1161 1162 switch (hci_stack->substate){ 1163 case HCI_INIT_W4_SEND_RESET: 1164 log_info("Resend HCI Reset"); 1165 hci_stack->substate = HCI_INIT_SEND_RESET; 1166 hci_stack->num_cmd_packets = 1; 1167 hci_run(); 1168 break; 1169 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET: 1170 log_info("Resend HCI Reset - CSR Warm Boot with Link Reset"); 1171 if (hci_stack->hci_transport->reset_link){ 1172 hci_stack->hci_transport->reset_link(); 1173 } 1174 1175 /* fall through */ 1176 1177 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1178 log_info("Resend HCI Reset - CSR Warm Boot"); 1179 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1180 hci_stack->num_cmd_packets = 1; 1181 hci_run(); 1182 break; 1183 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1184 if (hci_stack->hci_transport->set_baudrate){ 1185 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1186 log_info("Local baud rate change to %" PRIu32 "(timeout handler)", baud_rate); 1187 hci_stack->hci_transport->set_baudrate(baud_rate); 1188 } 1189 // For CSR, HCI Reset is sent on new baud rate. Don't forget to reset link for H5/BCSP 1190 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 1191 if (hci_stack->hci_transport->reset_link){ 1192 log_info("Link Reset"); 1193 hci_stack->hci_transport->reset_link(); 1194 } 1195 hci_stack->substate = HCI_INIT_SEND_RESET_CSR_WARM_BOOT; 1196 hci_run(); 1197 } 1198 break; 1199 case HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY: 1200 // otherwise continue 1201 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1202 hci_send_cmd(&hci_read_local_supported_commands); 1203 break; 1204 default: 1205 break; 1206 } 1207 } 1208 #endif 1209 1210 static void hci_initializing_next_state(void){ 1211 hci_stack->substate = (hci_substate_t )( ((int) hci_stack->substate) + 1); 1212 } 1213 1214 // assumption: hci_can_send_command_packet_now() == true 1215 static void hci_initializing_run(void){ 1216 log_debug("hci_initializing_run: substate %u, can send %u", hci_stack->substate, hci_can_send_command_packet_now()); 1217 switch (hci_stack->substate){ 1218 case HCI_INIT_SEND_RESET: 1219 hci_state_reset(); 1220 1221 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1222 // prepare reset if command complete not received in 100ms 1223 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1224 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1225 btstack_run_loop_add_timer(&hci_stack->timeout); 1226 #endif 1227 // send command 1228 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1229 hci_send_cmd(&hci_reset); 1230 break; 1231 case HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION: 1232 hci_send_cmd(&hci_read_local_version_information); 1233 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION; 1234 break; 1235 case HCI_INIT_SEND_READ_LOCAL_NAME: 1236 hci_send_cmd(&hci_read_local_name); 1237 hci_stack->substate = HCI_INIT_W4_SEND_READ_LOCAL_NAME; 1238 break; 1239 1240 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1241 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1242 hci_state_reset(); 1243 // prepare reset if command complete not received in 100ms 1244 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1245 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1246 btstack_run_loop_add_timer(&hci_stack->timeout); 1247 // send command 1248 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1249 hci_send_cmd(&hci_reset); 1250 break; 1251 case HCI_INIT_SEND_RESET_ST_WARM_BOOT: 1252 hci_state_reset(); 1253 hci_stack->substate = HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT; 1254 hci_send_cmd(&hci_reset); 1255 break; 1256 case HCI_INIT_SEND_BAUD_CHANGE: { 1257 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1258 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1259 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1260 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1261 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1262 // STLC25000D: baudrate change happens within 0.5 s after command was send, 1263 // use timer to update baud rate after 100 ms (knowing exactly, when command was sent is non-trivial) 1264 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS){ 1265 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1266 btstack_run_loop_add_timer(&hci_stack->timeout); 1267 } 1268 break; 1269 } 1270 case HCI_INIT_SEND_BAUD_CHANGE_BCM: { 1271 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1272 hci_stack->chipset->set_baudrate_command(baud_rate, hci_stack->hci_packet_buffer); 1273 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1274 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE_BCM; 1275 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1276 break; 1277 } 1278 case HCI_INIT_CUSTOM_INIT: 1279 // Custom initialization 1280 if (hci_stack->chipset && hci_stack->chipset->next_command){ 1281 hci_stack->chipset_result = (*hci_stack->chipset->next_command)(hci_stack->hci_packet_buffer); 1282 bool send_cmd = false; 1283 switch (hci_stack->chipset_result){ 1284 case BTSTACK_CHIPSET_VALID_COMMAND: 1285 send_cmd = true; 1286 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT; 1287 break; 1288 case BTSTACK_CHIPSET_WARMSTART_REQUIRED: 1289 send_cmd = true; 1290 // CSR Warm Boot: Wait a bit, then send HCI Reset until HCI Command Complete 1291 log_info("CSR Warm Boot"); 1292 btstack_run_loop_set_timer(&hci_stack->timeout, HCI_RESET_RESEND_TIMEOUT_MS); 1293 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1294 btstack_run_loop_add_timer(&hci_stack->timeout); 1295 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO) 1296 && hci_stack->config 1297 && hci_stack->chipset 1298 // && hci_stack->chipset->set_baudrate_command -- there's no such command 1299 && hci_stack->hci_transport->set_baudrate 1300 && hci_transport_uart_get_main_baud_rate()){ 1301 hci_stack->substate = HCI_INIT_W4_SEND_BAUD_CHANGE; 1302 } else { 1303 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT_LINK_RESET; 1304 } 1305 break; 1306 default: 1307 break; 1308 } 1309 1310 if (send_cmd){ 1311 int size = 3u + hci_stack->hci_packet_buffer[2u]; 1312 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1313 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, hci_stack->hci_packet_buffer, size); 1314 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, hci_stack->hci_packet_buffer, size); 1315 break; 1316 } 1317 log_info("Init script done"); 1318 1319 // Init script download on Broadcom chipsets causes: 1320 if ( (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1321 ( (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) 1322 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA)) ){ 1323 1324 // - baud rate to reset, restore UART baud rate if needed 1325 int need_baud_change = hci_stack->config 1326 && hci_stack->chipset 1327 && hci_stack->chipset->set_baudrate_command 1328 && hci_stack->hci_transport->set_baudrate 1329 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1330 if (need_baud_change) { 1331 uint32_t baud_rate = ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_init; 1332 log_info("Local baud rate change to %" PRIu32 " after init script (bcm)", baud_rate); 1333 hci_stack->hci_transport->set_baudrate(baud_rate); 1334 } 1335 1336 uint16_t bcm_delay_ms = 300; 1337 // - UART may or may not be disabled during update and Controller RTS may or may not be high during this time 1338 // -> Work around: wait here. 1339 log_info("BCM delay (%u ms) after init script", bcm_delay_ms); 1340 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_BCM_DELAY; 1341 btstack_run_loop_set_timer(&hci_stack->timeout, bcm_delay_ms); 1342 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_initialization_timeout_handler); 1343 btstack_run_loop_add_timer(&hci_stack->timeout); 1344 break; 1345 } 1346 } 1347 // otherwise continue 1348 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1349 hci_send_cmd(&hci_read_local_supported_commands); 1350 break; 1351 case HCI_INIT_SET_BD_ADDR: 1352 log_info("Set Public BD ADDR to %s", bd_addr_to_str(hci_stack->custom_bd_addr)); 1353 hci_stack->chipset->set_bd_addr_command(hci_stack->custom_bd_addr, hci_stack->hci_packet_buffer); 1354 hci_stack->last_cmd_opcode = little_endian_read_16(hci_stack->hci_packet_buffer, 0); 1355 hci_stack->substate = HCI_INIT_W4_SET_BD_ADDR; 1356 hci_send_cmd_packet(hci_stack->hci_packet_buffer, 3u + hci_stack->hci_packet_buffer[2u]); 1357 break; 1358 #endif 1359 1360 case HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS: 1361 log_info("Resend hci_read_local_supported_commands after CSR Warm Boot double reset"); 1362 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS; 1363 hci_send_cmd(&hci_read_local_supported_commands); 1364 break; 1365 case HCI_INIT_READ_BD_ADDR: 1366 hci_stack->substate = HCI_INIT_W4_READ_BD_ADDR; 1367 hci_send_cmd(&hci_read_bd_addr); 1368 break; 1369 case HCI_INIT_READ_BUFFER_SIZE: 1370 hci_stack->substate = HCI_INIT_W4_READ_BUFFER_SIZE; 1371 hci_send_cmd(&hci_read_buffer_size); 1372 break; 1373 case HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES: 1374 hci_stack->substate = HCI_INIT_W4_READ_LOCAL_SUPPORTED_FEATURES; 1375 hci_send_cmd(&hci_read_local_supported_features); 1376 break; 1377 1378 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 1379 case HCI_INIT_SET_CONTROLLER_TO_HOST_FLOW_CONTROL: 1380 hci_stack->substate = HCI_INIT_W4_SET_CONTROLLER_TO_HOST_FLOW_CONTROL; 1381 hci_send_cmd(&hci_set_controller_to_host_flow_control, 3); // ACL + SCO Flow Control 1382 break; 1383 case HCI_INIT_HOST_BUFFER_SIZE: 1384 hci_stack->substate = HCI_INIT_W4_HOST_BUFFER_SIZE; 1385 hci_send_cmd(&hci_host_buffer_size, HCI_HOST_ACL_PACKET_LEN, HCI_HOST_SCO_PACKET_LEN, 1386 HCI_HOST_ACL_PACKET_NUM, HCI_HOST_SCO_PACKET_NUM); 1387 break; 1388 #endif 1389 1390 case HCI_INIT_SET_EVENT_MASK: 1391 hci_stack->substate = HCI_INIT_W4_SET_EVENT_MASK; 1392 if (hci_le_supported()){ 1393 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x3FFFFFFF); 1394 } else { 1395 // Kensington Bluetooth 2.1 USB Dongle (CSR Chipset) returns an error for 0xffff... 1396 hci_send_cmd(&hci_set_event_mask,0xffffffff, 0x1FFFFFFF); 1397 } 1398 break; 1399 1400 #ifdef ENABLE_CLASSIC 1401 case HCI_INIT_WRITE_SIMPLE_PAIRING_MODE: 1402 hci_stack->substate = HCI_INIT_W4_WRITE_SIMPLE_PAIRING_MODE; 1403 hci_send_cmd(&hci_write_simple_pairing_mode, hci_stack->ssp_enable); 1404 break; 1405 case HCI_INIT_WRITE_PAGE_TIMEOUT: 1406 hci_stack->substate = HCI_INIT_W4_WRITE_PAGE_TIMEOUT; 1407 hci_send_cmd(&hci_write_page_timeout, 0x6000); // ca. 15 sec 1408 break; 1409 case HCI_INIT_WRITE_DEFAULT_LINK_POLICY_SETTING: 1410 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_LINK_POLICY_SETTING; 1411 hci_send_cmd(&hci_write_default_link_policy_setting, hci_stack->default_link_policy_settings); 1412 break; 1413 case HCI_INIT_WRITE_CLASS_OF_DEVICE: 1414 hci_stack->substate = HCI_INIT_W4_WRITE_CLASS_OF_DEVICE; 1415 hci_send_cmd(&hci_write_class_of_device, hci_stack->class_of_device); 1416 break; 1417 case HCI_INIT_WRITE_LOCAL_NAME: { 1418 hci_stack->substate = HCI_INIT_W4_WRITE_LOCAL_NAME; 1419 hci_reserve_packet_buffer(); 1420 uint8_t * packet = hci_stack->hci_packet_buffer; 1421 // construct HCI Command and send 1422 uint16_t opcode = hci_write_local_name.opcode; 1423 hci_stack->last_cmd_opcode = opcode; 1424 packet[0] = opcode & 0xff; 1425 packet[1] = opcode >> 8; 1426 packet[2] = DEVICE_NAME_LEN; 1427 memset(&packet[3], 0, DEVICE_NAME_LEN); 1428 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1429 uint16_t bytes_to_copy = btstack_min(name_len, DEVICE_NAME_LEN); 1430 // if shorter than DEVICE_NAME_LEN, it's implicitly NULL-terminated by memset call 1431 (void)memcpy(&packet[3], hci_stack->local_name, bytes_to_copy); 1432 // expand '00:00:00:00:00:00' in name with bd_addr 1433 btstack_replace_bd_addr_placeholder(&packet[3], bytes_to_copy, hci_stack->local_bd_addr); 1434 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + DEVICE_NAME_LEN); 1435 break; 1436 } 1437 case HCI_INIT_WRITE_EIR_DATA: { 1438 hci_stack->substate = HCI_INIT_W4_WRITE_EIR_DATA; 1439 hci_reserve_packet_buffer(); 1440 uint8_t * packet = hci_stack->hci_packet_buffer; 1441 // construct HCI Command in-place and send 1442 uint16_t opcode = hci_write_extended_inquiry_response.opcode; 1443 hci_stack->last_cmd_opcode = opcode; 1444 uint16_t offset = 0; 1445 packet[offset++] = opcode & 0xff; 1446 packet[offset++] = opcode >> 8; 1447 packet[offset++] = 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN; 1448 packet[offset++] = 0; // FEC not required 1449 memset(&packet[offset], 0, EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1450 if (hci_stack->eir_data){ 1451 // copy items and expand '00:00:00:00:00:00' in name with bd_addr 1452 ad_context_t context; 1453 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, hci_stack->eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)) { 1454 uint8_t data_type = ad_iterator_get_data_type(&context); 1455 uint8_t size = ad_iterator_get_data_len(&context); 1456 const uint8_t *data = ad_iterator_get_data(&context); 1457 // copy item 1458 packet[offset++] = size + 1; 1459 packet[offset++] = data_type; 1460 memcpy(&packet[offset], data, size); 1461 // update name item 1462 if ((data_type == BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME) || (data_type == BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME)){ 1463 btstack_replace_bd_addr_placeholder(&packet[offset], size, hci_stack->local_bd_addr); 1464 } 1465 offset += size; 1466 } 1467 } else { 1468 uint16_t name_len = (uint16_t) strlen(hci_stack->local_name); 1469 uint16_t bytes_to_copy = btstack_min(name_len, EXTENDED_INQUIRY_RESPONSE_DATA_LEN - 2); 1470 packet[offset++] = bytes_to_copy + 1; 1471 packet[offset++] = BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME; 1472 (void)memcpy(&packet[6], hci_stack->local_name, bytes_to_copy); 1473 // expand '00:00:00:00:00:00' in name with bd_addr 1474 btstack_replace_bd_addr_placeholder(&packet[offset], bytes_to_copy, hci_stack->local_bd_addr); 1475 } 1476 hci_send_cmd_packet(packet, HCI_CMD_HEADER_SIZE + 1 + EXTENDED_INQUIRY_RESPONSE_DATA_LEN); 1477 break; 1478 } 1479 case HCI_INIT_WRITE_INQUIRY_MODE: 1480 hci_stack->substate = HCI_INIT_W4_WRITE_INQUIRY_MODE; 1481 hci_send_cmd(&hci_write_inquiry_mode, (int) hci_stack->inquiry_mode); 1482 break; 1483 case HCI_INIT_WRITE_SECURE_CONNECTIONS_HOST_ENABLE: 1484 hci_send_cmd(&hci_write_secure_connections_host_support, 1); 1485 hci_stack->secure_connections_active = true; 1486 hci_stack->substate = HCI_INIT_W4_WRITE_SECURE_CONNECTIONS_HOST_ENABLE; 1487 break; 1488 case HCI_INIT_WRITE_SCAN_ENABLE: 1489 hci_send_cmd(&hci_write_scan_enable, (hci_stack->connectable << 1) | hci_stack->discoverable); // page scan 1490 hci_stack->substate = HCI_INIT_W4_WRITE_SCAN_ENABLE; 1491 break; 1492 // only sent if ENABLE_SCO_OVER_HCI is defined 1493 case HCI_INIT_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1494 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1495 hci_send_cmd(&hci_write_synchronous_flow_control_enable, 1); // SCO tracking enabled 1496 break; 1497 case HCI_INIT_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1498 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1499 hci_send_cmd(&hci_write_default_erroneous_data_reporting, 1); 1500 break; 1501 // only sent if manufacturer is Broadcom and ENABLE_SCO_OVER_HCI or ENABLE_SCO_OVER_PCM is defined 1502 case HCI_INIT_BCM_WRITE_SCO_PCM_INT: 1503 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1504 #ifdef ENABLE_SCO_OVER_HCI 1505 log_info("BCM: Route SCO data via HCI transport"); 1506 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 1, 0, 0, 0, 0); 1507 #endif 1508 #ifdef ENABLE_SCO_OVER_PCM 1509 log_info("BCM: Route SCO data via PCM interface"); 1510 hci_send_cmd(&hci_bcm_write_sco_pcm_int, 0, 4, 0, 1, 1); 1511 #endif 1512 break; 1513 1514 #endif 1515 #ifdef ENABLE_BLE 1516 // LE INIT 1517 case HCI_INIT_LE_READ_BUFFER_SIZE: 1518 hci_stack->substate = HCI_INIT_W4_LE_READ_BUFFER_SIZE; 1519 hci_send_cmd(&hci_le_read_buffer_size); 1520 break; 1521 case HCI_INIT_LE_SET_EVENT_MASK: 1522 hci_stack->substate = HCI_INIT_W4_LE_SET_EVENT_MASK; 1523 hci_send_cmd(&hci_le_set_event_mask, 0x809FF, 0x0); // bits 0-8, 11, 19 1524 break; 1525 case HCI_INIT_WRITE_LE_HOST_SUPPORTED: 1526 // LE Supported Host = 1, Simultaneous Host = 0 1527 hci_stack->substate = HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED; 1528 hci_send_cmd(&hci_write_le_host_supported, 1, 0); 1529 break; 1530 #endif 1531 1532 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1533 case HCI_INIT_LE_READ_MAX_DATA_LENGTH: 1534 hci_stack->substate = HCI_INIT_W4_LE_READ_MAX_DATA_LENGTH; 1535 hci_send_cmd(&hci_le_read_maximum_data_length); 1536 break; 1537 case HCI_INIT_LE_WRITE_SUGGESTED_DATA_LENGTH: 1538 hci_stack->substate = HCI_INIT_W4_LE_WRITE_SUGGESTED_DATA_LENGTH; 1539 hci_send_cmd(&hci_le_write_suggested_default_data_length, hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 1540 break; 1541 #endif 1542 1543 #ifdef ENABLE_LE_CENTRAL 1544 case HCI_INIT_READ_WHITE_LIST_SIZE: 1545 hci_stack->substate = HCI_INIT_W4_READ_WHITE_LIST_SIZE; 1546 hci_send_cmd(&hci_le_read_white_list_size); 1547 break; 1548 case HCI_INIT_LE_SET_SCAN_PARAMETERS: 1549 hci_stack->substate = HCI_INIT_W4_LE_SET_SCAN_PARAMETERS; 1550 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 1551 break; 1552 #endif 1553 default: 1554 return; 1555 } 1556 } 1557 1558 static void hci_init_done(void){ 1559 // done. tell the app 1560 log_info("hci_init_done -> HCI_STATE_WORKING"); 1561 hci_stack->state = HCI_STATE_WORKING; 1562 hci_emit_state(); 1563 hci_run(); 1564 } 1565 1566 static bool hci_initializing_event_handler_command_completed(const uint8_t * packet){ 1567 bool command_completed = false; 1568 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE){ 1569 uint16_t opcode = little_endian_read_16(packet,3); 1570 if (opcode == hci_stack->last_cmd_opcode){ 1571 command_completed = true; 1572 log_debug("Command complete for expected opcode %04x at substate %u", opcode, hci_stack->substate); 1573 } else { 1574 log_info("Command complete for different opcode %04x, expected %04x, at substate %u", opcode, hci_stack->last_cmd_opcode, hci_stack->substate); 1575 } 1576 } 1577 1578 if (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_STATUS){ 1579 uint8_t status = packet[2]; 1580 uint16_t opcode = little_endian_read_16(packet,4); 1581 if (opcode == hci_stack->last_cmd_opcode){ 1582 if (status){ 1583 command_completed = true; 1584 log_debug("Command status error 0x%02x for expected opcode %04x at substate %u", status, opcode, hci_stack->substate); 1585 } else { 1586 log_info("Command status OK for expected opcode %04x, waiting for command complete", opcode); 1587 } 1588 } else { 1589 log_debug("Command status for opcode %04x, expected %04x", opcode, hci_stack->last_cmd_opcode); 1590 } 1591 } 1592 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1593 // Vendor == CSR 1594 if ((hci_stack->substate == HCI_INIT_W4_CUSTOM_INIT) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1595 // TODO: track actual command 1596 command_completed = true; 1597 } 1598 1599 // Vendor == Toshiba 1600 if ((hci_stack->substate == HCI_INIT_W4_SEND_BAUD_CHANGE) && (hci_event_packet_get_type(packet) == HCI_EVENT_VENDOR_SPECIFIC)){ 1601 // TODO: track actual command 1602 command_completed = true; 1603 // Fix: no HCI Command Complete received, so num_cmd_packets not reset 1604 hci_stack->num_cmd_packets = 1; 1605 } 1606 #endif 1607 1608 return command_completed; 1609 } 1610 1611 static void hci_initializing_event_handler(const uint8_t * packet, uint16_t size){ 1612 1613 UNUSED(size); // ok: less than 6 bytes are read from our buffer 1614 1615 bool command_completed = hci_initializing_event_handler_command_completed(packet); 1616 1617 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1618 1619 // Late response (> 100 ms) for HCI Reset e.g. on Toshiba TC35661: 1620 // Command complete for HCI Reset arrives after we've resent the HCI Reset command 1621 // 1622 // HCI Reset 1623 // Timeout 100 ms 1624 // HCI Reset 1625 // Command Complete Reset 1626 // HCI Read Local Version Information 1627 // Command Complete Reset - but we expected Command Complete Read Local Version Information 1628 // hang... 1629 // 1630 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1631 if (!command_completed 1632 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1633 && (hci_stack->substate == HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION)){ 1634 1635 uint16_t opcode = little_endian_read_16(packet,3); 1636 if (opcode == hci_reset.opcode){ 1637 hci_stack->substate = HCI_INIT_SEND_READ_LOCAL_VERSION_INFORMATION; 1638 return; 1639 } 1640 } 1641 1642 // CSR & H5 1643 // Fix: Command Complete for HCI Reset in HCI_INIT_W4_SEND_READ_LOCAL_VERSION_INFORMATION trigger resend 1644 if (!command_completed 1645 && (hci_event_packet_get_type(packet) == HCI_EVENT_COMMAND_COMPLETE) 1646 && (hci_stack->substate == HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS)){ 1647 1648 uint16_t opcode = little_endian_read_16(packet,3); 1649 if (opcode == hci_reset.opcode){ 1650 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1651 return; 1652 } 1653 } 1654 1655 // on CSR with BCSP/H5, the reset resend timeout leads to substate == HCI_INIT_SEND_RESET or HCI_INIT_SEND_RESET_CSR_WARM_BOOT 1656 // fix: Correct substate and behave as command below 1657 if (command_completed){ 1658 switch (hci_stack->substate){ 1659 case HCI_INIT_SEND_RESET: 1660 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1661 break; 1662 case HCI_INIT_SEND_RESET_CSR_WARM_BOOT: 1663 hci_stack->substate = HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT; 1664 break; 1665 default: 1666 break; 1667 } 1668 } 1669 1670 #endif 1671 1672 if (!command_completed) return; 1673 1674 bool need_baud_change = false; 1675 bool need_addr_change = false; 1676 1677 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1678 need_baud_change = hci_stack->config 1679 && hci_stack->chipset 1680 && hci_stack->chipset->set_baudrate_command 1681 && hci_stack->hci_transport->set_baudrate 1682 && ((hci_transport_config_uart_t *)hci_stack->config)->baudrate_main; 1683 1684 need_addr_change = hci_stack->custom_bd_addr_set 1685 && hci_stack->chipset 1686 && hci_stack->chipset->set_bd_addr_command; 1687 #endif 1688 1689 switch(hci_stack->substate){ 1690 1691 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1692 case HCI_INIT_SEND_RESET: 1693 // on CSR with BCSP/H5, resend triggers resend of HCI Reset and leads to substate == HCI_INIT_SEND_RESET 1694 // fix: just correct substate and behave as command below 1695 hci_stack->substate = HCI_INIT_W4_SEND_RESET; 1696 btstack_run_loop_remove_timer(&hci_stack->timeout); 1697 break; 1698 case HCI_INIT_W4_SEND_RESET: 1699 btstack_run_loop_remove_timer(&hci_stack->timeout); 1700 break; 1701 case HCI_INIT_W4_SEND_READ_LOCAL_NAME: 1702 log_info("Received local name, need baud change %d", (int) need_baud_change); 1703 if (need_baud_change){ 1704 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE; 1705 return; 1706 } 1707 // skip baud change 1708 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1709 return; 1710 case HCI_INIT_W4_SEND_BAUD_CHANGE: 1711 // for STLC2500D, baud rate change already happened. 1712 // for others, baud rate gets changed now 1713 if ((hci_stack->manufacturer != BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) && need_baud_change){ 1714 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1715 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change)", baud_rate); 1716 hci_stack->hci_transport->set_baudrate(baud_rate); 1717 } 1718 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1719 return; 1720 case HCI_INIT_W4_CUSTOM_INIT_CSR_WARM_BOOT: 1721 btstack_run_loop_remove_timer(&hci_stack->timeout); 1722 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1723 return; 1724 case HCI_INIT_W4_CUSTOM_INIT: 1725 // repeat custom init 1726 hci_stack->substate = HCI_INIT_CUSTOM_INIT; 1727 return; 1728 #else 1729 case HCI_INIT_W4_SEND_RESET: 1730 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_COMMANDS; 1731 return ; 1732 #endif 1733 1734 case HCI_INIT_W4_READ_LOCAL_SUPPORTED_COMMANDS: 1735 if (need_baud_change && (hci_stack->chipset_result != BTSTACK_CHIPSET_NO_INIT_SCRIPT) && 1736 ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) || 1737 (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_EM_MICROELECTRONIC_MARIN_SA))) { 1738 hci_stack->substate = HCI_INIT_SEND_BAUD_CHANGE_BCM; 1739 return; 1740 } 1741 if (need_addr_change){ 1742 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1743 return; 1744 } 1745 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1746 return; 1747 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 1748 case HCI_INIT_W4_SEND_BAUD_CHANGE_BCM: 1749 if (need_baud_change){ 1750 uint32_t baud_rate = hci_transport_uart_get_main_baud_rate(); 1751 log_info("Local baud rate change to %" PRIu32 "(w4_send_baud_change_bcm))", baud_rate); 1752 hci_stack->hci_transport->set_baudrate(baud_rate); 1753 } 1754 if (need_addr_change){ 1755 hci_stack->substate = HCI_INIT_SET_BD_ADDR; 1756 return; 1757 } 1758 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1759 return; 1760 case HCI_INIT_W4_SET_BD_ADDR: 1761 // for STLC2500D + ATWILC3000, bd addr change only gets active after sending reset command 1762 if ((hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ST_MICROELECTRONICS) 1763 || (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_ATMEL_CORPORATION)){ 1764 hci_stack->substate = HCI_INIT_SEND_RESET_ST_WARM_BOOT; 1765 return; 1766 } 1767 // skipping st warm boot 1768 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1769 return; 1770 case HCI_INIT_W4_SEND_RESET_ST_WARM_BOOT: 1771 hci_stack->substate = HCI_INIT_READ_BD_ADDR; 1772 return; 1773 #endif 1774 case HCI_INIT_W4_READ_BD_ADDR: 1775 // only read buffer size if supported 1776 if (hci_stack->local_supported_commands[0u] & 0x01u) { 1777 hci_stack->substate = HCI_INIT_READ_BUFFER_SIZE; 1778 return; 1779 } 1780 // skipping read buffer size 1781 hci_stack->substate = HCI_INIT_READ_LOCAL_SUPPORTED_FEATURES; 1782 return; 1783 case HCI_INIT_W4_SET_EVENT_MASK: 1784 // skip Classic init commands for LE only chipsets 1785 if (!hci_classic_supported()){ 1786 #ifdef ENABLE_BLE 1787 if (hci_le_supported()){ 1788 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; // skip all classic command 1789 return; 1790 } 1791 #endif 1792 log_error("Neither BR/EDR nor LE supported"); 1793 hci_init_done(); 1794 return; 1795 } 1796 if (!gap_ssp_supported()){ 1797 hci_stack->substate = HCI_INIT_WRITE_PAGE_TIMEOUT; 1798 return; 1799 } 1800 break; 1801 #ifdef ENABLE_BLE 1802 case HCI_INIT_W4_LE_READ_BUFFER_SIZE: 1803 // skip write le host if not supported (e.g. on LE only EM9301) 1804 if (hci_stack->local_supported_commands[0u] & 0x02u) break; 1805 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1806 return; 1807 1808 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 1809 case HCI_INIT_W4_WRITE_LE_HOST_SUPPORTED: 1810 log_info("Supported commands %x", hci_stack->local_supported_commands[0] & 0x30); 1811 if ((hci_stack->local_supported_commands[0u] & 0x30u) == 0x30u){ 1812 hci_stack->substate = HCI_INIT_LE_SET_EVENT_MASK; 1813 return; 1814 } 1815 // explicit fall through to reduce repetitions 1816 1817 #ifdef ENABLE_LE_CENTRAL 1818 hci_stack->substate = HCI_INIT_READ_WHITE_LIST_SIZE; 1819 #else 1820 hci_init_done(); 1821 #endif 1822 return; 1823 #endif /* ENABLE_LE_DATA_LENGTH_EXTENSION */ 1824 1825 #endif /* ENABLE_BLE */ 1826 1827 case HCI_INIT_W4_WRITE_INQUIRY_MODE: 1828 // skip write secure connections host support if not supported or disabled 1829 if (!hci_stack->secure_connections_enable || (hci_stack->local_supported_commands[1u] & 0x02u) == 0u) { 1830 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; 1831 return; 1832 } 1833 break; 1834 1835 #ifdef ENABLE_SCO_OVER_HCI 1836 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1837 // skip write synchronous flow control if not supported 1838 if (hci_stack->local_supported_commands[0] & 0x04) break; 1839 hci_stack->substate = HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE; 1840 1841 /* fall through */ 1842 1843 case HCI_INIT_W4_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 1844 // skip write default erroneous data reporting if not supported 1845 if (hci_stack->local_supported_commands[0] & 0x08) break; 1846 hci_stack->substate = HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING; 1847 1848 /* fall through */ 1849 1850 case HCI_INIT_W4_WRITE_DEFAULT_ERRONEOUS_DATA_REPORTING: 1851 // skip bcm set sco pcm config on non-Broadcom chipsets 1852 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) break; 1853 hci_stack->substate = HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT; 1854 1855 /* fall through */ 1856 1857 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1858 if (!hci_le_supported()){ 1859 // SKIP LE init for Classic only configuration 1860 hci_init_done(); 1861 return; 1862 } 1863 break; 1864 1865 #else /* !ENABLE_SCO_OVER_HCI */ 1866 1867 case HCI_INIT_W4_WRITE_SCAN_ENABLE: 1868 #ifdef ENABLE_SCO_OVER_PCM 1869 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION) { 1870 hci_stack->substate = HCI_INIT_BCM_WRITE_SCO_PCM_INT; 1871 return; 1872 } 1873 #endif 1874 /* fall through */ 1875 1876 case HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT: 1877 #ifdef ENABLE_BLE 1878 if (hci_le_supported()){ 1879 hci_stack->substate = HCI_INIT_LE_READ_BUFFER_SIZE; 1880 return; 1881 } 1882 #endif 1883 // SKIP LE init for Classic only configuration 1884 hci_init_done(); 1885 return; 1886 #endif /* ENABLE_SCO_OVER_HCI */ 1887 1888 // avoid compile error due to duplicate cases: HCI_INIT_W4_BCM_WRITE_SCO_PCM_INT == HCI_INIT_DONE-1 1889 #if defined(ENABLE_BLE) || defined(ENABLE_LE_DATA_LENGTH_EXTENSION) || defined(ENABLE_LE_CENTRAL) 1890 // Response to command before init done state -> init done 1891 case (HCI_INIT_DONE-1): 1892 hci_init_done(); 1893 return; 1894 #endif 1895 1896 default: 1897 break; 1898 } 1899 hci_initializing_next_state(); 1900 } 1901 1902 static void hci_handle_connection_failed(hci_connection_t * conn, uint8_t status){ 1903 log_info("Outgoing connection to %s failed", bd_addr_to_str(conn->address)); 1904 bd_addr_t bd_address; 1905 (void)memcpy(&bd_address, conn->address, 6); 1906 1907 #ifdef ENABLE_CLASSIC 1908 // cache needed data 1909 int notify_dedicated_bonding_failed = conn->bonding_flags & BONDING_DEDICATED; 1910 #endif 1911 1912 // connection failed, remove entry 1913 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 1914 btstack_memory_hci_connection_free( conn ); 1915 1916 #ifdef ENABLE_CLASSIC 1917 // notify client if dedicated bonding 1918 if (notify_dedicated_bonding_failed){ 1919 log_info("hci notify_dedicated_bonding_failed"); 1920 hci_emit_dedicated_bonding_result(bd_address, status); 1921 } 1922 1923 // if authentication error, also delete link key 1924 if (status == ERROR_CODE_AUTHENTICATION_FAILURE) { 1925 gap_drop_link_key_for_bd_addr(bd_address); 1926 } 1927 #else 1928 UNUSED(status); 1929 #endif 1930 } 1931 1932 #ifdef ENABLE_CLASSIC 1933 static void hci_handle_remote_features_page_0(hci_connection_t * conn, const uint8_t * features){ 1934 // SSP Controller 1935 if (features[6] & (1 << 3)){ 1936 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER; 1937 } 1938 // eSCO 1939 if (features[3] & (1<<7)){ 1940 conn->remote_supported_features[0] |= 1; 1941 } 1942 // Extended features 1943 if (features[7] & (1<<7)){ 1944 conn->remote_supported_features[0] |= 2; 1945 } 1946 } 1947 1948 static void hci_handle_remote_features_page_1(hci_connection_t * conn, const uint8_t * features){ 1949 // SSP Host 1950 if (features[0] & (1 << 0)){ 1951 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SSP_HOST; 1952 } 1953 // SC Host 1954 if (features[0] & (1 << 3)){ 1955 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_HOST; 1956 } 1957 } 1958 1959 static void hci_handle_remote_features_page_2(hci_connection_t * conn, const uint8_t * features){ 1960 // SC Controller 1961 if (features[1] & (1 << 0)){ 1962 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 1963 } 1964 } 1965 1966 static void hci_handle_remote_features_received(hci_connection_t * conn){ 1967 conn->bonding_flags |= BONDING_RECEIVED_REMOTE_FEATURES; 1968 log_info("Remote features %02x, bonding flags %x", conn->remote_supported_features[0], conn->bonding_flags); 1969 if (conn->bonding_flags & BONDING_DEDICATED){ 1970 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 1971 } 1972 } 1973 #endif 1974 1975 static void handle_event_for_current_stack_state(const uint8_t * packet, uint16_t size) { 1976 // handle BT initialization 1977 if (hci_stack->state == HCI_STATE_INITIALIZING) { 1978 hci_initializing_event_handler(packet, size); 1979 } 1980 1981 // help with BT sleep 1982 if ((hci_stack->state == HCI_STATE_FALLING_ASLEEP) 1983 && (hci_stack->substate == HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE) 1984 && HCI_EVENT_IS_COMMAND_COMPLETE(packet, hci_write_scan_enable)) { 1985 hci_initializing_next_state(); 1986 } 1987 } 1988 1989 #ifdef ENABLE_CLASSIC 1990 static void hci_handle_read_encryption_key_size_complete(hci_connection_t * conn, uint8_t encryption_key_size) { 1991 conn->authentication_flags |= CONNECTION_ENCRYPTED; 1992 conn->encryption_key_size = encryption_key_size; 1993 1994 if ((conn->authentication_flags & CONNECTION_AUTHENTICATED) != 0) { 1995 hci_emit_security_level(conn->con_handle, gap_security_level_for_connection(conn)); 1996 return; 1997 } 1998 1999 // Request Authentication if not already done 2000 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 2001 conn->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 2002 } 2003 #endif 2004 2005 static void handle_command_complete_event(uint8_t * packet, uint16_t size){ 2006 UNUSED(size); 2007 2008 uint16_t manufacturer; 2009 #ifdef ENABLE_CLASSIC 2010 hci_con_handle_t handle; 2011 hci_connection_t * conn; 2012 uint8_t status; 2013 #endif 2014 // get num cmd packets - limit to 1 to reduce complexity 2015 hci_stack->num_cmd_packets = packet[2] ? 1 : 0; 2016 2017 uint16_t opcode = hci_event_command_complete_get_command_opcode(packet); 2018 switch (opcode){ 2019 case HCI_OPCODE_HCI_READ_LOCAL_NAME: 2020 if (packet[5]) break; 2021 // terminate, name 248 chars 2022 packet[6+248] = 0; 2023 log_info("local name: %s", &packet[6]); 2024 break; 2025 case HCI_OPCODE_HCI_READ_BUFFER_SIZE: 2026 // "The HC_ACL_Data_Packet_Length return parameter will be used to determine the size of the L2CAP segments contained in ACL Data Packets" 2027 if (hci_stack->state == HCI_STATE_INITIALIZING) { 2028 uint16_t acl_len = little_endian_read_16(packet, 6); 2029 uint16_t sco_len = packet[8]; 2030 2031 // determine usable ACL/SCO payload size 2032 hci_stack->acl_data_packet_length = btstack_min(acl_len, HCI_ACL_PAYLOAD_SIZE); 2033 hci_stack->sco_data_packet_length = btstack_min(sco_len, HCI_ACL_PAYLOAD_SIZE); 2034 2035 hci_stack->acl_packets_total_num = little_endian_read_16(packet, 9); 2036 hci_stack->sco_packets_total_num = little_endian_read_16(packet, 11); 2037 2038 log_info("hci_read_buffer_size: ACL size module %u -> used %u, count %u / SCO size %u, count %u", 2039 acl_len, hci_stack->acl_data_packet_length, hci_stack->acl_packets_total_num, 2040 hci_stack->sco_data_packet_length, hci_stack->sco_packets_total_num); 2041 } 2042 break; 2043 case HCI_OPCODE_HCI_READ_RSSI: 2044 if (packet[5] == ERROR_CODE_SUCCESS){ 2045 uint8_t event[5]; 2046 event[0] = GAP_EVENT_RSSI_MEASUREMENT; 2047 event[1] = 3; 2048 (void)memcpy(&event[2], &packet[6], 3); 2049 hci_emit_event(event, sizeof(event), 1); 2050 } 2051 break; 2052 #ifdef ENABLE_BLE 2053 case HCI_OPCODE_HCI_LE_READ_BUFFER_SIZE: 2054 hci_stack->le_data_packets_length = little_endian_read_16(packet, 6); 2055 hci_stack->le_acl_packets_total_num = packet[8]; 2056 // determine usable ACL payload size 2057 if (HCI_ACL_PAYLOAD_SIZE < hci_stack->le_data_packets_length){ 2058 hci_stack->le_data_packets_length = HCI_ACL_PAYLOAD_SIZE; 2059 } 2060 log_info("hci_le_read_buffer_size: size %u, count %u", hci_stack->le_data_packets_length, hci_stack->le_acl_packets_total_num); 2061 break; 2062 #endif 2063 #ifdef ENABLE_LE_DATA_LENGTH_EXTENSION 2064 case HCI_OPCODE_HCI_LE_READ_MAXIMUM_DATA_LENGTH: 2065 hci_stack->le_supported_max_tx_octets = little_endian_read_16(packet, 6); 2066 hci_stack->le_supported_max_tx_time = little_endian_read_16(packet, 8); 2067 log_info("hci_le_read_maximum_data_length: tx octets %u, tx time %u us", hci_stack->le_supported_max_tx_octets, hci_stack->le_supported_max_tx_time); 2068 break; 2069 #endif 2070 #ifdef ENABLE_LE_CENTRAL 2071 case HCI_OPCODE_HCI_LE_READ_WHITE_LIST_SIZE: 2072 hci_stack->le_whitelist_capacity = packet[6]; 2073 log_info("hci_le_read_white_list_size: size %u", hci_stack->le_whitelist_capacity); 2074 break; 2075 #endif 2076 case HCI_OPCODE_HCI_READ_BD_ADDR: 2077 reverse_bd_addr(&packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], hci_stack->local_bd_addr); 2078 log_info("Local Address, Status: 0x%02x: Addr: %s", packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE], bd_addr_to_str(hci_stack->local_bd_addr)); 2079 #ifdef ENABLE_CLASSIC 2080 if (hci_stack->link_key_db){ 2081 hci_stack->link_key_db->set_local_bd_addr(hci_stack->local_bd_addr); 2082 } 2083 #endif 2084 break; 2085 #ifdef ENABLE_CLASSIC 2086 case HCI_OPCODE_HCI_WRITE_SCAN_ENABLE: 2087 hci_emit_discoverable_enabled(hci_stack->discoverable); 2088 break; 2089 case HCI_OPCODE_HCI_INQUIRY_CANCEL: 2090 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W4_CANCELLED){ 2091 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2092 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2093 hci_emit_event(event, sizeof(event), 1); 2094 } 2095 break; 2096 #endif 2097 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_FEATURES: 2098 (void)memcpy(hci_stack->local_supported_features, &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE + 1], 8); 2099 2100 #ifdef ENABLE_CLASSIC 2101 // determine usable ACL packet types based on host buffer size and supported features 2102 hci_stack->packet_types = hci_acl_packet_types_for_buffer_size_and_local_features(HCI_ACL_PAYLOAD_SIZE, &hci_stack->local_supported_features[0]); 2103 log_info("Packet types %04x, eSCO %u", hci_stack->packet_types, hci_extended_sco_link_supported()); 2104 #endif 2105 // Classic/LE 2106 log_info("BR/EDR support %u, LE support %u", hci_classic_supported(), hci_le_supported()); 2107 break; 2108 case HCI_OPCODE_HCI_READ_LOCAL_VERSION_INFORMATION: 2109 manufacturer = little_endian_read_16(packet, 10); 2110 // map Cypress to Broadcom 2111 if (manufacturer == BLUETOOTH_COMPANY_ID_CYPRESS_SEMICONDUCTOR){ 2112 log_info("Treat Cypress as Broadcom"); 2113 manufacturer = BLUETOOTH_COMPANY_ID_BROADCOM_CORPORATION; 2114 little_endian_store_16(packet, 10, manufacturer); 2115 } 2116 hci_stack->manufacturer = manufacturer; 2117 log_info("Manufacturer: 0x%04x", hci_stack->manufacturer); 2118 break; 2119 case HCI_OPCODE_HCI_READ_LOCAL_SUPPORTED_COMMANDS: 2120 hci_stack->local_supported_commands[0] = 2121 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+14u] & 0x80u) >> 7u) | // bit 0 = Octet 14, bit 7 / Read Buffer Size 2122 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+24u] & 0x40u) >> 5u) | // bit 1 = Octet 24, bit 6 / Write Le Host Supported 2123 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+10u] & 0x10u) >> 2u) | // bit 2 = Octet 10, bit 4 / Write Synchronous Flow Control Enable 2124 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+18u] & 0x08u) ) | // bit 3 = Octet 18, bit 3 / Write Default Erroneous Data Reporting 2125 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+34u] & 0x01u) << 4u) | // bit 4 = Octet 34, bit 0 / LE Write Suggested Default Data Length 2126 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x08u) << 2u) | // bit 5 = Octet 35, bit 3 / LE Read Maximum Data Length 2127 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x20u) << 1u) | // bit 6 = Octet 35, bit 5 / LE Set Default PHY 2128 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+20u] & 0x10u) << 3u); // bit 7 = Octet 20, bit 4 / Read Encryption Key Size 2129 hci_stack->local_supported_commands[1] = 2130 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+ 2u] & 0x40u) >> 6u) | // bit 8 = Octet 2, bit 6 / Read Remote Extended Features 2131 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x08u) >> 2u) | // bit 9 = Octet 32, bit 3 / Write Secure Connections Host 2132 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+35u] & 0x02u) << 1u) | // bit 10 = Octet 35, bit 1 / LE Set Address Resolution Enable 2133 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x02u) << 2u) | // bit 11 = Octet 32, bit 1 / Remote OOB Extended Data Request Reply 2134 ((packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1u+32u] & 0x40u) >> 2u); // bit 12 = Octet 32, bit 6 / Read Local OOB Extended Data command 2135 log_info("Local supported commands summary %02x - %02x", hci_stack->local_supported_commands[0], hci_stack->local_supported_commands[1]); 2136 break; 2137 #ifdef ENABLE_CLASSIC 2138 case HCI_OPCODE_HCI_WRITE_SYNCHRONOUS_FLOW_CONTROL_ENABLE: 2139 if (packet[5]) return; 2140 hci_stack->synchronous_flow_control_enabled = 1; 2141 break; 2142 case HCI_OPCODE_HCI_READ_ENCRYPTION_KEY_SIZE: 2143 status = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE]; 2144 handle = little_endian_read_16(packet, OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1); 2145 conn = hci_connection_for_handle(handle); 2146 if (conn != NULL) { 2147 uint8_t key_size = 0; 2148 if (status == 0){ 2149 key_size = packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+3]; 2150 log_info("Handle %04x key Size: %u", handle, key_size); 2151 } else { 2152 log_info("Read Encryption Key Size failed 0x%02x-> assuming insecure connection with key size of 1", status); 2153 } 2154 hci_handle_read_encryption_key_size_complete(conn, key_size); 2155 } 2156 break; 2157 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2158 case HCI_OPCODE_HCI_READ_LOCAL_OOB_DATA: 2159 case HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA:{ 2160 uint8_t event[67]; 2161 event[0] = GAP_EVENT_LOCAL_OOB_DATA; 2162 event[1] = 65; 2163 (void)memset(&event[2], 0, 65); 2164 if (packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE] == ERROR_CODE_SUCCESS){ 2165 (void)memcpy(&event[3], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+1], 32); 2166 if (opcode == HCI_OPCODE_HCI_READ_LOCAL_EXTENDED_OOB_DATA){ 2167 event[2] = 3; 2168 (void)memcpy(&event[35], &packet[OFFSET_OF_DATA_IN_COMMAND_COMPLETE+33], 32); 2169 } else { 2170 event[2] = 1; 2171 } 2172 } 2173 hci_emit_event(event, sizeof(event), 0); 2174 break; 2175 } 2176 #endif 2177 #endif 2178 default: 2179 break; 2180 } 2181 } 2182 2183 #ifdef ENABLE_BLE 2184 static void event_handle_le_connection_complete(const uint8_t * packet){ 2185 bd_addr_t addr; 2186 bd_addr_type_t addr_type; 2187 hci_connection_t * conn; 2188 2189 // Connection management 2190 reverse_bd_addr(&packet[8], addr); 2191 addr_type = (bd_addr_type_t)packet[7]; 2192 log_info("LE Connection_complete (status=%u) type %u, %s", packet[3], addr_type, bd_addr_to_str(addr)); 2193 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2194 2195 #ifdef ENABLE_LE_CENTRAL 2196 // handle error: error is reported only to the initiator -> outgoing connection 2197 if (packet[3]){ 2198 2199 // handle cancelled outgoing connection 2200 // "If the cancellation was successful then, after the Command Complete event for the LE_Create_Connection_Cancel command, 2201 // either an LE Connection Complete or an LE Enhanced Connection Complete event shall be generated. 2202 // In either case, the event shall be sent with the error code Unknown Connection Identifier (0x02)." 2203 if (packet[3] == ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER){ 2204 // whitelist connect 2205 if (hci_is_le_connection_type(addr_type)){ 2206 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2207 } 2208 // get outgoing connection conn struct for direct connect 2209 conn = gap_get_outgoing_connection(); 2210 } 2211 2212 // outgoing le connection establishment is done 2213 if (conn){ 2214 // remove entry 2215 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 2216 btstack_memory_hci_connection_free( conn ); 2217 } 2218 return; 2219 } 2220 #endif 2221 2222 // on success, both hosts receive connection complete event 2223 if (packet[6] == HCI_ROLE_MASTER){ 2224 #ifdef ENABLE_LE_CENTRAL 2225 // if we're master on an le connection, it was an outgoing connection and we're done with it 2226 // note: no hci_connection_t object exists yet for connect with whitelist 2227 if (hci_is_le_connection_type(addr_type)){ 2228 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2229 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 2230 } 2231 #endif 2232 } else { 2233 #ifdef ENABLE_LE_PERIPHERAL 2234 // if we're slave, it was an incoming connection, advertisements have stopped 2235 hci_stack->le_advertisements_active = false; 2236 #endif 2237 } 2238 2239 // LE connections are auto-accepted, so just create a connection if there isn't one already 2240 if (!conn){ 2241 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2242 } 2243 2244 // no memory, sorry. 2245 if (!conn){ 2246 return; 2247 } 2248 2249 conn->state = OPEN; 2250 conn->role = packet[6]; 2251 conn->con_handle = hci_subevent_le_connection_complete_get_connection_handle(packet); 2252 conn->le_connection_interval = hci_subevent_le_connection_complete_get_conn_interval(packet); 2253 2254 #ifdef ENABLE_LE_PERIPHERAL 2255 if (packet[6] == HCI_ROLE_SLAVE){ 2256 hci_update_advertisements_enabled_for_current_roles(); 2257 } 2258 #endif 2259 2260 // init unenhanced att bearer mtu 2261 conn->att_connection.mtu = ATT_DEFAULT_MTU; 2262 conn->att_connection.mtu_exchanged = false; 2263 2264 // TODO: store - role, peer address type, conn_interval, conn_latency, supervision timeout, master clock 2265 2266 // restart timer 2267 // btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2268 // btstack_run_loop_add_timer(&conn->timeout); 2269 2270 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2271 2272 hci_emit_nr_connections_changed(); 2273 } 2274 #endif 2275 2276 static void event_handler(uint8_t *packet, uint16_t size){ 2277 2278 uint16_t event_length = packet[1]; 2279 2280 // assert packet is complete 2281 if (size != (event_length + 2u)){ 2282 log_error("event_handler called with packet of wrong size %d, expected %u => dropping packet", size, event_length + 2); 2283 return; 2284 } 2285 2286 bd_addr_type_t addr_type; 2287 hci_con_handle_t handle; 2288 hci_connection_t * conn; 2289 int i; 2290 int create_connection_cmd; 2291 2292 #ifdef ENABLE_CLASSIC 2293 hci_link_type_t link_type; 2294 bd_addr_t addr; 2295 #endif 2296 2297 // log_info("HCI:EVENT:%02x", hci_event_packet_get_type(packet)); 2298 2299 switch (hci_event_packet_get_type(packet)) { 2300 2301 case HCI_EVENT_COMMAND_COMPLETE: 2302 handle_command_complete_event(packet, size); 2303 break; 2304 2305 case HCI_EVENT_COMMAND_STATUS: 2306 // get num cmd packets - limit to 1 to reduce complexity 2307 hci_stack->num_cmd_packets = packet[3] ? 1 : 0; 2308 2309 // check command status to detected failed outgoing connections 2310 create_connection_cmd = 0; 2311 #ifdef ENABLE_CLASSIC 2312 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_create_connection)){ 2313 create_connection_cmd = 1; 2314 } 2315 #endif 2316 #ifdef ENABLE_LE_CENTRAL 2317 if (HCI_EVENT_IS_COMMAND_STATUS(packet, hci_le_create_connection)){ 2318 create_connection_cmd = 1; 2319 } 2320 #endif 2321 if (create_connection_cmd) { 2322 uint8_t status = hci_event_command_status_get_status(packet); 2323 addr_type = hci_stack->outgoing_addr_type; 2324 conn = hci_connection_for_bd_addr_and_type(hci_stack->outgoing_addr, addr_type); 2325 log_info("command status (create connection), status %x, connection %p, addr %s, type %x", status, conn, bd_addr_to_str(hci_stack->outgoing_addr), addr_type); 2326 2327 // reset outgoing address info 2328 memset(hci_stack->outgoing_addr, 0, 6); 2329 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_UNKNOWN; 2330 2331 // on error 2332 if (status != ERROR_CODE_SUCCESS){ 2333 #ifdef ENABLE_LE_CENTRAL 2334 if (hci_is_le_connection_type(addr_type)){ 2335 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 2336 } 2337 #endif 2338 // error => outgoing connection failed 2339 if (conn != NULL){ 2340 hci_handle_connection_failed(conn, status); 2341 } 2342 } 2343 } 2344 break; 2345 2346 case HCI_EVENT_NUMBER_OF_COMPLETED_PACKETS:{ 2347 if (size < 3) return; 2348 uint16_t num_handles = packet[2]; 2349 if (size != (3u + num_handles * 4u)) return; 2350 uint16_t offset = 3; 2351 for (i=0; i<num_handles;i++){ 2352 handle = little_endian_read_16(packet, offset) & 0x0fffu; 2353 offset += 2u; 2354 uint16_t num_packets = little_endian_read_16(packet, offset); 2355 offset += 2u; 2356 2357 conn = hci_connection_for_handle(handle); 2358 if (!conn){ 2359 log_error("hci_number_completed_packet lists unused con handle %u", handle); 2360 continue; 2361 } 2362 2363 if (conn->num_packets_sent >= num_packets){ 2364 conn->num_packets_sent -= num_packets; 2365 } else { 2366 log_error("hci_number_completed_packets, more packet slots freed then sent."); 2367 conn->num_packets_sent = 0; 2368 } 2369 // log_info("hci_number_completed_packet %u processed for handle %u, outstanding %u", num_packets, handle, conn->num_packets_sent); 2370 2371 #ifdef ENABLE_CLASSIC 2372 // For SCO, we do the can_send_now_check here 2373 hci_notify_if_sco_can_send_now(); 2374 #endif 2375 } 2376 break; 2377 } 2378 2379 #ifdef ENABLE_CLASSIC 2380 case HCI_EVENT_INQUIRY_COMPLETE: 2381 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_ACTIVE){ 2382 hci_stack->inquiry_state = GAP_INQUIRY_STATE_IDLE; 2383 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 2384 hci_emit_event(event, sizeof(event), 1); 2385 } 2386 break; 2387 case HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE: 2388 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W4_COMPLETE){ 2389 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_IDLE; 2390 } 2391 break; 2392 case HCI_EVENT_CONNECTION_REQUEST: 2393 reverse_bd_addr(&packet[2], addr); 2394 link_type = (hci_link_type_t) packet[11]; 2395 if (hci_stack->gap_classic_accept_callback != NULL){ 2396 if ((*hci_stack->gap_classic_accept_callback)(addr, link_type) == 0){ 2397 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_UNACCEPTABLE_BD_ADDR; 2398 bd_addr_copy(hci_stack->decline_addr, addr); 2399 break; 2400 } 2401 } 2402 2403 // TODO: eval COD 8-10 2404 log_info("Connection_incoming: %s, type %u", bd_addr_to_str(addr), (unsigned int) link_type); 2405 addr_type = (link_type == HCI_LINK_TYPE_ACL) ? BD_ADDR_TYPE_ACL : BD_ADDR_TYPE_SCO; 2406 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2407 if (!conn) { 2408 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 2409 } 2410 if (!conn) { 2411 // CONNECTION REJECTED DUE TO LIMITED RESOURCES (0X0D) 2412 hci_stack->decline_reason = ERROR_CODE_CONNECTION_REJECTED_DUE_TO_LIMITED_RESOURCES; 2413 bd_addr_copy(hci_stack->decline_addr, addr); 2414 break; 2415 } 2416 conn->role = HCI_ROLE_SLAVE; 2417 conn->state = RECEIVED_CONNECTION_REQUEST; 2418 // store info about eSCO 2419 if (link_type == HCI_LINK_TYPE_ESCO){ 2420 conn->remote_supported_features[0] |= 1; 2421 } 2422 hci_run(); 2423 break; 2424 2425 case HCI_EVENT_CONNECTION_COMPLETE: 2426 // Connection management 2427 reverse_bd_addr(&packet[5], addr); 2428 log_info("Connection_complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2429 addr_type = BD_ADDR_TYPE_ACL; 2430 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2431 if (conn) { 2432 if (!packet[2]){ 2433 conn->state = OPEN; 2434 conn->con_handle = little_endian_read_16(packet, 3); 2435 2436 // queue get remote feature 2437 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 2438 2439 // queue set supervision timeout if we're master 2440 if ((hci_stack->link_supervision_timeout != 0) && (conn->role == HCI_ROLE_MASTER)){ 2441 connectionSetAuthenticationFlags(conn, WRITE_SUPERVISION_TIMEOUT); 2442 } 2443 2444 // restart timer 2445 btstack_run_loop_set_timer(&conn->timeout, HCI_CONNECTION_TIMEOUT_MS); 2446 btstack_run_loop_add_timer(&conn->timeout); 2447 2448 log_info("New connection: handle %u, %s", conn->con_handle, bd_addr_to_str(conn->address)); 2449 2450 hci_emit_nr_connections_changed(); 2451 } else { 2452 // connection failed 2453 hci_handle_connection_failed(conn, packet[2]); 2454 } 2455 } 2456 break; 2457 2458 case HCI_EVENT_SYNCHRONOUS_CONNECTION_COMPLETE: 2459 reverse_bd_addr(&packet[5], addr); 2460 log_info("Synchronous Connection Complete (status=%u) %s", packet[2], bd_addr_to_str(addr)); 2461 if (packet[2]){ 2462 // connection failed 2463 break; 2464 } 2465 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2466 if (!conn) { 2467 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 2468 } 2469 if (!conn) { 2470 break; 2471 } 2472 conn->state = OPEN; 2473 conn->con_handle = little_endian_read_16(packet, 3); 2474 2475 #ifdef ENABLE_SCO_OVER_HCI 2476 // update SCO 2477 if (conn->address_type == BD_ADDR_TYPE_SCO && hci_stack->hci_transport && hci_stack->hci_transport->set_sco_config){ 2478 hci_stack->hci_transport->set_sco_config(hci_stack->sco_voice_setting_active, hci_number_sco_connections()); 2479 } 2480 // trigger can send now 2481 if (hci_have_usb_transport()){ 2482 hci_stack->sco_can_send_now = 1; 2483 } 2484 #endif 2485 break; 2486 2487 case HCI_EVENT_READ_REMOTE_SUPPORTED_FEATURES_COMPLETE: 2488 handle = little_endian_read_16(packet, 3); 2489 conn = hci_connection_for_handle(handle); 2490 if (!conn) break; 2491 if (!packet[2]){ 2492 const uint8_t * features = &packet[5]; 2493 hci_handle_remote_features_page_0(conn, features); 2494 2495 // read extended features if possible 2496 if (((hci_stack->local_supported_commands[1] & 1) != 0) && ((conn->remote_supported_features[0] & 2) != 0)) { 2497 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 2498 break; 2499 } 2500 } 2501 hci_handle_remote_features_received(conn); 2502 break; 2503 2504 case HCI_EVENT_READ_REMOTE_EXTENDED_FEATURES_COMPLETE: 2505 handle = little_endian_read_16(packet, 3); 2506 conn = hci_connection_for_handle(handle); 2507 if (!conn) break; 2508 // status = ok, page = 1 2509 if (!packet[2]) { 2510 uint8_t page_number = packet[5]; 2511 uint8_t maximum_page_number = packet[6]; 2512 const uint8_t * features = &packet[7]; 2513 bool done = false; 2514 switch (page_number){ 2515 case 1: 2516 hci_handle_remote_features_page_1(conn, features); 2517 if (maximum_page_number >= 2){ 2518 // get Secure Connections (Controller) from Page 2 if available 2519 conn->bonding_flags |= BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 2520 } else { 2521 // otherwise, assume SC (Controller) == SC (Host) 2522 if ((conn->bonding_flags & BONDING_REMOTE_SUPPORTS_SC_HOST) != 0){ 2523 conn->bonding_flags |= BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 2524 } 2525 done = true; 2526 } 2527 break; 2528 case 2: 2529 hci_handle_remote_features_page_2(conn, features); 2530 done = true; 2531 break; 2532 default: 2533 break; 2534 } 2535 if (!done) break; 2536 } 2537 hci_handle_remote_features_received(conn); 2538 break; 2539 2540 case HCI_EVENT_LINK_KEY_REQUEST: 2541 log_info("HCI_EVENT_LINK_KEY_REQUEST"); 2542 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_LINK_KEY_REQUEST); 2543 // request handled by hci_run() 2544 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], HANDLE_LINK_KEY_REQUEST); 2545 break; 2546 2547 case HCI_EVENT_LINK_KEY_NOTIFICATION: { 2548 reverse_bd_addr(&packet[2], addr); 2549 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 2550 if (!conn) break; 2551 conn->authentication_flags |= RECV_LINK_KEY_NOTIFICATION; 2552 link_key_type_t link_key_type = (link_key_type_t)packet[24]; 2553 // Change Connection Encryption keeps link key type 2554 if (link_key_type != CHANGED_COMBINATION_KEY){ 2555 conn->link_key_type = link_key_type; 2556 } 2557 gap_store_link_key_for_bd_addr(addr, &packet[8], conn->link_key_type); 2558 // still forward event to allow dismiss of pairing dialog 2559 break; 2560 } 2561 2562 case HCI_EVENT_PIN_CODE_REQUEST: 2563 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], LEGACY_PAIRING_ACTIVE); 2564 // non-bondable mode: pin code negative reply will be sent 2565 if (!hci_stack->bondable){ 2566 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], DENY_PIN_CODE_REQUEST); 2567 hci_run(); 2568 return; 2569 } 2570 // PIN CODE REQUEST means the link key request didn't succee -> delete stored link key 2571 if (!hci_stack->link_key_db) break; 2572 hci_event_pin_code_request_get_bd_addr(packet, addr); 2573 hci_stack->link_key_db->delete_link_key(addr); 2574 break; 2575 2576 case HCI_EVENT_IO_CAPABILITY_REQUEST: 2577 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], RECV_IO_CAPABILITIES_REQUEST); 2578 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_IO_CAPABILITIES_REPLY); 2579 break; 2580 2581 #ifdef ENABLE_CLASSIC_PAIRING_OOB 2582 case HCI_EVENT_REMOTE_OOB_DATA_REQUEST: 2583 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2584 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_REMOTE_OOB_DATA_REPLY); 2585 break; 2586 #endif 2587 2588 case HCI_EVENT_USER_CONFIRMATION_REQUEST: 2589 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2590 if (!hci_stack->ssp_auto_accept) break; 2591 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_CONFIRM_REPLY); 2592 break; 2593 2594 case HCI_EVENT_USER_PASSKEY_REQUEST: 2595 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SSP_PAIRING_ACTIVE); 2596 if (!hci_stack->ssp_auto_accept) break; 2597 hci_add_connection_flags_for_flipped_bd_addr(&packet[2], SEND_USER_PASSKEY_REPLY); 2598 break; 2599 2600 case HCI_EVENT_MODE_CHANGE: 2601 handle = hci_event_mode_change_get_handle(packet); 2602 conn = hci_connection_for_handle(handle); 2603 if (!conn) break; 2604 conn->connection_mode = hci_event_mode_change_get_mode(packet); 2605 log_info("HCI_EVENT_MODE_CHANGE, handle 0x%04x, mode %u", handle, conn->connection_mode); 2606 break; 2607 #endif 2608 2609 case HCI_EVENT_ENCRYPTION_CHANGE: 2610 handle = hci_event_encryption_change_get_connection_handle(packet); 2611 conn = hci_connection_for_handle(handle); 2612 if (!conn) break; 2613 if (hci_event_encryption_change_get_status(packet) == 0u) { 2614 uint8_t encryption_enabled = hci_event_encryption_change_get_encryption_enabled(packet); 2615 if (encryption_enabled){ 2616 if (hci_is_le_connection(conn)){ 2617 // For LE, we accept connection as encrypted 2618 conn->authentication_flags |= CONNECTION_ENCRYPTED; 2619 } 2620 #ifdef ENABLE_CLASSIC 2621 else { 2622 // Detect Secure Connection -> Legacy Connection Downgrade Attack (BIAS) 2623 bool sc_used_during_pairing = gap_secure_connection_for_link_key_type(conn->link_key_type) != 0; 2624 bool connected_uses_aes_ccm = encryption_enabled == 2; 2625 if (hci_stack->secure_connections_active && sc_used_during_pairing && !connected_uses_aes_ccm){ 2626 log_info("SC during pairing, but only E0 now -> abort"); 2627 conn->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 2628 break; 2629 } 2630 2631 // if AES-CCM is used, authentication used SC -> authentication was mutual and we can skip explicit authentication 2632 if (connected_uses_aes_ccm){ 2633 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2634 } 2635 2636 if ((hci_stack->local_supported_commands[0] & 0x80) != 0){ 2637 // For Classic, we need to validate encryption key size first, if possible (== supported by Controller) 2638 conn->bonding_flags |= BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 2639 } else { 2640 // if not, pretend everything is perfect 2641 hci_handle_read_encryption_key_size_complete(conn, 16); 2642 } 2643 } 2644 #endif 2645 } else { 2646 conn->authentication_flags &= ~CONNECTION_ENCRYPTED; 2647 } 2648 } 2649 2650 break; 2651 2652 #ifdef ENABLE_CLASSIC 2653 case HCI_EVENT_AUTHENTICATION_COMPLETE_EVENT: 2654 handle = hci_event_authentication_complete_get_connection_handle(packet); 2655 conn = hci_connection_for_handle(handle); 2656 if (!conn) break; 2657 2658 // ignore authentication event if we didn't request it 2659 if ((conn->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) == 0) break; 2660 2661 // dedicated bonding: send result and disconnect 2662 if (conn->bonding_flags & BONDING_DEDICATED){ 2663 conn->bonding_flags &= ~BONDING_DEDICATED; 2664 conn->bonding_flags |= BONDING_DISCONNECT_DEDICATED_DONE; 2665 conn->bonding_status = packet[2]; 2666 break; 2667 } 2668 2669 // authenticated only if auth status == 0 2670 if (hci_event_authentication_complete_get_status(packet) == 0){ 2671 // authenticated 2672 conn->authentication_flags |= CONNECTION_AUTHENTICATED; 2673 2674 // If link key sufficient for requested security and not already encrypted, start encryption 2675 if (((gap_security_level_for_link_key_type(conn->link_key_type) >= conn->requested_security_level)) && 2676 ((conn->authentication_flags & CONNECTION_ENCRYPTED) == 0)){ 2677 conn->bonding_flags |= BONDING_SEND_ENCRYPTION_REQUEST; 2678 break; 2679 } 2680 } 2681 2682 // emit updated security level 2683 hci_emit_security_level(handle, gap_security_level_for_connection(conn)); 2684 break; 2685 #endif 2686 2687 // HCI_EVENT_DISCONNECTION_COMPLETE 2688 // has been split, to first notify stack before shutting connection down 2689 // see end of function, too. 2690 case HCI_EVENT_DISCONNECTION_COMPLETE: 2691 if (packet[2]) break; // status != 0 2692 handle = little_endian_read_16(packet, 3); 2693 // drop outgoing ACL fragments if it is for closed connection and release buffer if tx not active 2694 if (hci_stack->acl_fragmentation_total_size > 0u) { 2695 if (handle == READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer)){ 2696 int release_buffer = hci_stack->acl_fragmentation_tx_active == 0u; 2697 log_info("drop fragmented ACL data for closed connection, release buffer %u", release_buffer); 2698 hci_stack->acl_fragmentation_total_size = 0; 2699 hci_stack->acl_fragmentation_pos = 0; 2700 if (release_buffer){ 2701 hci_release_packet_buffer(); 2702 } 2703 } 2704 } 2705 2706 conn = hci_connection_for_handle(handle); 2707 if (!conn) break; 2708 // mark connection for shutdown 2709 conn->state = RECEIVED_DISCONNECTION_COMPLETE; 2710 2711 // emit dedicatd bonding event 2712 if (conn->bonding_flags & BONDING_EMIT_COMPLETE_ON_DISCONNECT){ 2713 hci_emit_dedicated_bonding_result(conn->address, conn->bonding_status); 2714 } 2715 2716 #ifdef ENABLE_BLE 2717 #ifdef ENABLE_LE_PERIPHERAL 2718 // re-enable advertisements for le connections if active 2719 if (hci_is_le_connection(conn)){ 2720 hci_update_advertisements_enabled_for_current_roles(); 2721 } 2722 #endif 2723 #endif 2724 break; 2725 2726 case HCI_EVENT_HARDWARE_ERROR: 2727 log_error("Hardware Error: 0x%02x", packet[2]); 2728 if (hci_stack->hardware_error_callback){ 2729 (*hci_stack->hardware_error_callback)(packet[2]); 2730 } else { 2731 // if no special requests, just reboot stack 2732 hci_power_control_off(); 2733 hci_power_control_on(); 2734 } 2735 break; 2736 2737 #ifdef ENABLE_CLASSIC 2738 case HCI_EVENT_ROLE_CHANGE: 2739 if (packet[2]) break; // status != 0 2740 reverse_bd_addr(&packet[3], addr); 2741 addr_type = BD_ADDR_TYPE_ACL; 2742 conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 2743 if (!conn) break; 2744 conn->role = packet[9]; 2745 break; 2746 #endif 2747 2748 case HCI_EVENT_TRANSPORT_PACKET_SENT: 2749 // release packet buffer only for asynchronous transport and if there are not further fragements 2750 if (hci_transport_synchronous()) { 2751 log_error("Synchronous HCI Transport shouldn't send HCI_EVENT_TRANSPORT_PACKET_SENT"); 2752 return; // instead of break: to avoid re-entering hci_run() 2753 } 2754 hci_stack->acl_fragmentation_tx_active = 0; 2755 if (hci_stack->acl_fragmentation_total_size) break; 2756 hci_release_packet_buffer(); 2757 2758 // L2CAP receives this event via the hci_emit_event below 2759 2760 #ifdef ENABLE_CLASSIC 2761 // For SCO, we do the can_send_now_check here 2762 hci_notify_if_sco_can_send_now(); 2763 #endif 2764 break; 2765 2766 #ifdef ENABLE_CLASSIC 2767 case HCI_EVENT_SCO_CAN_SEND_NOW: 2768 // For SCO, we do the can_send_now_check here 2769 hci_stack->sco_can_send_now = 1; 2770 hci_notify_if_sco_can_send_now(); 2771 return; 2772 2773 // explode inquriy results for easier consumption 2774 case HCI_EVENT_INQUIRY_RESULT: 2775 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 2776 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 2777 gap_inquiry_explode(packet, size); 2778 break; 2779 #endif 2780 2781 #ifdef ENABLE_BLE 2782 case HCI_EVENT_LE_META: 2783 switch (packet[2]){ 2784 #ifdef ENABLE_LE_CENTRAL 2785 case HCI_SUBEVENT_LE_ADVERTISING_REPORT: 2786 // log_info("advertising report received"); 2787 if (!hci_stack->le_scanning_enabled) break; 2788 le_handle_advertisement_report(packet, size); 2789 break; 2790 #endif 2791 case HCI_SUBEVENT_LE_CONNECTION_COMPLETE: 2792 event_handle_le_connection_complete(packet); 2793 break; 2794 2795 // log_info("LE buffer size: %u, count %u", little_endian_read_16(packet,6), packet[8]); 2796 case HCI_SUBEVENT_LE_CONNECTION_UPDATE_COMPLETE: 2797 handle = hci_subevent_le_connection_update_complete_get_connection_handle(packet); 2798 conn = hci_connection_for_handle(handle); 2799 if (!conn) break; 2800 conn->le_connection_interval = hci_subevent_le_connection_update_complete_get_conn_interval(packet); 2801 break; 2802 2803 case HCI_SUBEVENT_LE_REMOTE_CONNECTION_PARAMETER_REQUEST: 2804 // connection 2805 handle = hci_subevent_le_remote_connection_parameter_request_get_connection_handle(packet); 2806 conn = hci_connection_for_handle(handle); 2807 if (conn) { 2808 // read arguments 2809 uint16_t le_conn_interval_min = hci_subevent_le_remote_connection_parameter_request_get_interval_min(packet); 2810 uint16_t le_conn_interval_max = hci_subevent_le_remote_connection_parameter_request_get_interval_max(packet); 2811 uint16_t le_conn_latency = hci_subevent_le_remote_connection_parameter_request_get_latency(packet); 2812 uint16_t le_supervision_timeout = hci_subevent_le_remote_connection_parameter_request_get_timeout(packet); 2813 2814 // validate against current connection parameter range 2815 le_connection_parameter_range_t existing_range; 2816 gap_get_connection_parameter_range(&existing_range); 2817 int update_parameter = gap_connection_parameter_range_included(&existing_range, le_conn_interval_min, le_conn_interval_max, le_conn_latency, le_supervision_timeout); 2818 if (update_parameter){ 2819 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_REPLY; 2820 conn->le_conn_interval_min = le_conn_interval_min; 2821 conn->le_conn_interval_max = le_conn_interval_max; 2822 conn->le_conn_latency = le_conn_latency; 2823 conn->le_supervision_timeout = le_supervision_timeout; 2824 } else { 2825 conn->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NEGATIVE_REPLY; 2826 } 2827 } 2828 break; 2829 #ifdef ENABLE_LE_LIMIT_ACL_FRAGMENT_BY_MAX_OCTETS 2830 case HCI_SUBEVENT_LE_DATA_LENGTH_CHANGE: 2831 handle = hci_subevent_le_data_length_change_get_connection_handle(packet); 2832 conn = hci_connection_for_handle(handle); 2833 if (conn) { 2834 conn->le_max_tx_octets = hci_subevent_le_data_length_change_get_max_tx_octets(packet); 2835 } 2836 break; 2837 #endif 2838 default: 2839 break; 2840 } 2841 break; 2842 #endif 2843 case HCI_EVENT_VENDOR_SPECIFIC: 2844 // Vendor specific commands often create vendor specific event instead of num completed packets 2845 // To avoid getting stuck as num_cmds_packets is zero, reset it to 1 for controllers with this behaviour 2846 switch (hci_stack->manufacturer){ 2847 case BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO: 2848 hci_stack->num_cmd_packets = 1; 2849 break; 2850 default: 2851 break; 2852 } 2853 break; 2854 default: 2855 break; 2856 } 2857 2858 handle_event_for_current_stack_state(packet, size); 2859 2860 // notify upper stack 2861 hci_emit_event(packet, size, 0); // don't dump, already happened in packet handler 2862 2863 // moved here to give upper stack a chance to close down everything with hci_connection_t intact 2864 if ((hci_event_packet_get_type(packet) == HCI_EVENT_DISCONNECTION_COMPLETE) && (packet[2] == 0)){ 2865 handle = little_endian_read_16(packet, 3); 2866 hci_connection_t * aConn = hci_connection_for_handle(handle); 2867 // discard connection if app did not trigger a reconnect in the event handler 2868 if (aConn && aConn->state == RECEIVED_DISCONNECTION_COMPLETE){ 2869 hci_shutdown_connection(aConn); 2870 } 2871 } 2872 2873 // execute main loop 2874 hci_run(); 2875 } 2876 2877 #ifdef ENABLE_CLASSIC 2878 2879 static void sco_tx_timeout_handler(btstack_timer_source_t * ts); 2880 static void sco_schedule_tx(hci_connection_t * conn); 2881 2882 static void sco_tx_timeout_handler(btstack_timer_source_t * ts){ 2883 log_debug("SCO TX Timeout"); 2884 hci_con_handle_t con_handle = (hci_con_handle_t) (uintptr_t) btstack_run_loop_get_timer_context(ts); 2885 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2886 if (!conn) return; 2887 2888 // trigger send 2889 conn->sco_tx_ready = 1; 2890 // extra packet if CVSD but SCO buffer is too short 2891 if (((hci_stack->sco_voice_setting_active & 0x03) != 0x03) && (hci_stack->sco_data_packet_length < 123)){ 2892 conn->sco_tx_ready++; 2893 } 2894 hci_notify_if_sco_can_send_now(); 2895 } 2896 2897 2898 #define SCO_TX_AFTER_RX_MS (6) 2899 2900 static void sco_schedule_tx(hci_connection_t * conn){ 2901 2902 uint32_t now = btstack_run_loop_get_time_ms(); 2903 uint32_t sco_tx_ms = conn->sco_rx_ms + SCO_TX_AFTER_RX_MS; 2904 int time_delta_ms = sco_tx_ms - now; 2905 2906 btstack_timer_source_t * timer = (conn->sco_rx_count & 1) ? &conn->timeout : &conn->timeout_sco; 2907 2908 // log_error("SCO TX at %u in %u", (int) sco_tx_ms, time_delta_ms); 2909 btstack_run_loop_set_timer(timer, time_delta_ms); 2910 btstack_run_loop_set_timer_context(timer, (void *) (uintptr_t) conn->con_handle); 2911 btstack_run_loop_set_timer_handler(timer, &sco_tx_timeout_handler); 2912 btstack_run_loop_add_timer(timer); 2913 } 2914 2915 static void sco_handler(uint8_t * packet, uint16_t size){ 2916 // lookup connection struct 2917 hci_con_handle_t con_handle = READ_SCO_CONNECTION_HANDLE(packet); 2918 hci_connection_t * conn = hci_connection_for_handle(con_handle); 2919 if (!conn) return; 2920 2921 // CSR 8811 prefixes 60 byte SCO packet in transparent mode with 20 zero bytes -> skip first 20 payload bytes 2922 if (hci_stack->manufacturer == BLUETOOTH_COMPANY_ID_CAMBRIDGE_SILICON_RADIO){ 2923 if ((size == 83) && ((hci_stack->sco_voice_setting_active & 0x03) == 0x03)){ 2924 packet[2] = 0x3c; 2925 memmove(&packet[3], &packet[23], 63); 2926 size = 63; 2927 } 2928 } 2929 2930 if (hci_have_usb_transport()){ 2931 // Nothing to do 2932 } else { 2933 // log_debug("sco flow %u, handle 0x%04x, packets sent %u, bytes send %u", hci_stack->synchronous_flow_control_enabled, (int) con_handle, conn->num_packets_sent, conn->num_sco_bytes_sent); 2934 if (hci_stack->synchronous_flow_control_enabled == 0){ 2935 uint32_t now = btstack_run_loop_get_time_ms(); 2936 2937 if (!conn->sco_rx_valid){ 2938 // ignore first 10 packets 2939 conn->sco_rx_count++; 2940 // log_debug("sco rx count %u", conn->sco_rx_count); 2941 if (conn->sco_rx_count == 10) { 2942 // use first timestamp as is and pretent it just started 2943 conn->sco_rx_ms = now; 2944 conn->sco_rx_valid = 1; 2945 conn->sco_rx_count = 0; 2946 sco_schedule_tx(conn); 2947 } 2948 } else { 2949 // track expected arrival timme 2950 conn->sco_rx_count++; 2951 conn->sco_rx_ms += 7; 2952 int delta = (int32_t) (now - conn->sco_rx_ms); 2953 if (delta > 0){ 2954 conn->sco_rx_ms++; 2955 } 2956 // log_debug("sco rx %u", conn->sco_rx_ms); 2957 sco_schedule_tx(conn); 2958 } 2959 } 2960 } 2961 // deliver to app 2962 if (hci_stack->sco_packet_handler) { 2963 hci_stack->sco_packet_handler(HCI_SCO_DATA_PACKET, 0, packet, size); 2964 } 2965 2966 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 2967 conn->num_packets_completed++; 2968 hci_stack->host_completed_packets = 1; 2969 hci_run(); 2970 #endif 2971 } 2972 #endif 2973 2974 static void packet_handler(uint8_t packet_type, uint8_t *packet, uint16_t size){ 2975 hci_dump_packet(packet_type, 1, packet, size); 2976 switch (packet_type) { 2977 case HCI_EVENT_PACKET: 2978 event_handler(packet, size); 2979 break; 2980 case HCI_ACL_DATA_PACKET: 2981 acl_handler(packet, size); 2982 break; 2983 #ifdef ENABLE_CLASSIC 2984 case HCI_SCO_DATA_PACKET: 2985 sco_handler(packet, size); 2986 break; 2987 #endif 2988 default: 2989 break; 2990 } 2991 } 2992 2993 /** 2994 * @brief Add event packet handler. 2995 */ 2996 void hci_add_event_handler(btstack_packet_callback_registration_t * callback_handler){ 2997 btstack_linked_list_add_tail(&hci_stack->event_handlers, (btstack_linked_item_t*) callback_handler); 2998 } 2999 3000 3001 /** Register HCI packet handlers */ 3002 void hci_register_acl_packet_handler(btstack_packet_handler_t handler){ 3003 hci_stack->acl_packet_handler = handler; 3004 } 3005 3006 #ifdef ENABLE_CLASSIC 3007 /** 3008 * @brief Registers a packet handler for SCO data. Used for HSP and HFP profiles. 3009 */ 3010 void hci_register_sco_packet_handler(btstack_packet_handler_t handler){ 3011 hci_stack->sco_packet_handler = handler; 3012 } 3013 #endif 3014 3015 static void hci_state_reset(void){ 3016 // no connections yet 3017 hci_stack->connections = NULL; 3018 3019 // keep discoverable/connectable as this has been requested by the client(s) 3020 // hci_stack->discoverable = 0; 3021 // hci_stack->connectable = 0; 3022 // hci_stack->bondable = 1; 3023 // hci_stack->own_addr_type = 0; 3024 3025 // buffer is free 3026 hci_stack->hci_packet_buffer_reserved = 0; 3027 3028 // no pending cmds 3029 hci_stack->decline_reason = 0; 3030 hci_stack->new_scan_enable_value = 0xff; 3031 3032 hci_stack->secure_connections_active = false; 3033 3034 // LE 3035 #ifdef ENABLE_BLE 3036 memset(hci_stack->le_random_address, 0, 6); 3037 hci_stack->le_random_address_set = 0; 3038 #endif 3039 #ifdef ENABLE_LE_CENTRAL 3040 hci_stack->le_scanning_active = 0; 3041 hci_stack->le_connecting_state = LE_CONNECTING_IDLE; 3042 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 3043 hci_stack->le_whitelist_capacity = 0; 3044 #endif 3045 } 3046 3047 #ifdef ENABLE_CLASSIC 3048 /** 3049 * @brief Configure Bluetooth hardware control. Has to be called before power on. 3050 */ 3051 void hci_set_link_key_db(btstack_link_key_db_t const * link_key_db){ 3052 // store and open remote device db 3053 hci_stack->link_key_db = link_key_db; 3054 if (hci_stack->link_key_db) { 3055 hci_stack->link_key_db->open(); 3056 } 3057 } 3058 #endif 3059 3060 void hci_init(const hci_transport_t *transport, const void *config){ 3061 3062 #ifdef HAVE_MALLOC 3063 if (!hci_stack) { 3064 hci_stack = (hci_stack_t*) malloc(sizeof(hci_stack_t)); 3065 } 3066 #else 3067 hci_stack = &hci_stack_static; 3068 #endif 3069 memset(hci_stack, 0, sizeof(hci_stack_t)); 3070 3071 // reference to use transport layer implementation 3072 hci_stack->hci_transport = transport; 3073 3074 // reference to used config 3075 hci_stack->config = config; 3076 3077 // setup pointer for outgoing packet buffer 3078 hci_stack->hci_packet_buffer = &hci_stack->hci_packet_buffer_data[HCI_OUTGOING_PRE_BUFFER_SIZE]; 3079 3080 // max acl payload size defined in config.h 3081 hci_stack->acl_data_packet_length = HCI_ACL_PAYLOAD_SIZE; 3082 3083 // register packet handlers with transport 3084 transport->register_packet_handler(&packet_handler); 3085 3086 hci_stack->state = HCI_STATE_OFF; 3087 3088 // class of device 3089 hci_stack->class_of_device = 0x007a020c; // Smartphone 3090 3091 // bondable by default 3092 hci_stack->bondable = 1; 3093 3094 #ifdef ENABLE_CLASSIC 3095 // classic name 3096 hci_stack->local_name = default_classic_name; 3097 3098 // Master slave policy 3099 hci_stack->master_slave_policy = 1; 3100 3101 // Allow Role Switch 3102 hci_stack->allow_role_switch = 1; 3103 3104 // Default / minimum security level = 2 3105 hci_stack->gap_security_level = LEVEL_2; 3106 3107 // Errata-11838 mandates 7 bytes for GAP Security Level 1-3 3108 hci_stack->gap_required_encyrption_key_size = 7; 3109 #endif 3110 3111 // Secure Simple Pairing default: enable, no I/O capabilities, general bonding, mitm not required, auto accept 3112 hci_stack->ssp_enable = 1; 3113 hci_stack->ssp_io_capability = SSP_IO_CAPABILITY_NO_INPUT_NO_OUTPUT; 3114 hci_stack->ssp_authentication_requirement = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_GENERAL_BONDING; 3115 hci_stack->ssp_auto_accept = 1; 3116 3117 // Secure Connections: enable (requires support from Controller) 3118 hci_stack->secure_connections_enable = true; 3119 3120 // voice setting - signed 16 bit pcm data with CVSD over the air 3121 hci_stack->sco_voice_setting = 0x60; 3122 3123 #ifdef ENABLE_LE_CENTRAL 3124 // connection parameter to use for outgoing connections 3125 hci_stack->le_connection_scan_interval = 0x0060; // 60ms 3126 hci_stack->le_connection_scan_window = 0x0030; // 30ms 3127 hci_stack->le_connection_interval_min = 0x0008; // 10 ms 3128 hci_stack->le_connection_interval_max = 0x0018; // 30 ms 3129 hci_stack->le_connection_latency = 4; // 4 3130 hci_stack->le_supervision_timeout = 0x0048; // 720 ms 3131 hci_stack->le_minimum_ce_length = 2; // 1.25 ms 3132 hci_stack->le_maximum_ce_length = 0x0030; // 30 ms 3133 3134 // default LE Scanning 3135 hci_stack->le_scan_type = 0x1; // active 3136 hci_stack->le_scan_interval = 0x1e0; // 300 ms 3137 hci_stack->le_scan_window = 0x30; // 30 ms 3138 #endif 3139 3140 #ifdef ENABLE_LE_PERIPHERAL 3141 hci_stack->le_max_number_peripheral_connections = 1; // only single connection as peripheral 3142 #endif 3143 3144 // connection parameter range used to answer connection parameter update requests in l2cap 3145 hci_stack->le_connection_parameter_range.le_conn_interval_min = 6; 3146 hci_stack->le_connection_parameter_range.le_conn_interval_max = 3200; 3147 hci_stack->le_connection_parameter_range.le_conn_latency_min = 0; 3148 hci_stack->le_connection_parameter_range.le_conn_latency_max = 500; 3149 hci_stack->le_connection_parameter_range.le_supervision_timeout_min = 10; 3150 hci_stack->le_connection_parameter_range.le_supervision_timeout_max = 3200; 3151 3152 hci_state_reset(); 3153 } 3154 3155 void hci_deinit(void){ 3156 #ifdef HAVE_MALLOC 3157 if (hci_stack) { 3158 free(hci_stack); 3159 } 3160 #endif 3161 hci_stack = NULL; 3162 3163 #ifdef ENABLE_CLASSIC 3164 disable_l2cap_timeouts = 0; 3165 #endif 3166 } 3167 3168 /** 3169 * @brief Configure Bluetooth chipset driver. Has to be called before power on, or right after receiving the local version information 3170 */ 3171 void hci_set_chipset(const btstack_chipset_t *chipset_driver){ 3172 hci_stack->chipset = chipset_driver; 3173 3174 // reset chipset driver - init is also called on power_up 3175 if (hci_stack->chipset && hci_stack->chipset->init){ 3176 hci_stack->chipset->init(hci_stack->config); 3177 } 3178 } 3179 3180 /** 3181 * @brief Configure Bluetooth hardware control. Has to be called after hci_init() but before power on. 3182 */ 3183 void hci_set_control(const btstack_control_t *hardware_control){ 3184 // references to used control implementation 3185 hci_stack->control = hardware_control; 3186 // init with transport config 3187 hardware_control->init(hci_stack->config); 3188 } 3189 3190 void hci_close(void){ 3191 // close remote device db 3192 if (hci_stack->link_key_db) { 3193 hci_stack->link_key_db->close(); 3194 } 3195 3196 btstack_linked_list_iterator_t lit; 3197 btstack_linked_list_iterator_init(&lit, &hci_stack->connections); 3198 while (btstack_linked_list_iterator_has_next(&lit)){ 3199 // cancel all l2cap connections by emitting dicsconnection complete before shutdown (free) connection 3200 hci_connection_t * connection = (hci_connection_t*) btstack_linked_list_iterator_next(&lit); 3201 hci_emit_disconnection_complete(connection->con_handle, 0x16); // terminated by local host 3202 hci_shutdown_connection(connection); 3203 } 3204 3205 hci_power_control(HCI_POWER_OFF); 3206 3207 #ifdef HAVE_MALLOC 3208 free(hci_stack); 3209 #endif 3210 hci_stack = NULL; 3211 } 3212 3213 #ifdef ENABLE_CLASSIC 3214 void gap_set_required_encryption_key_size(uint8_t encryption_key_size){ 3215 // validate ranage and set 3216 if (encryption_key_size < 7) return; 3217 if (encryption_key_size > 16) return; 3218 hci_stack->gap_required_encyrption_key_size = encryption_key_size; 3219 } 3220 3221 void gap_set_security_level(gap_security_level_t security_level){ 3222 hci_stack->gap_security_level = security_level; 3223 } 3224 3225 gap_security_level_t gap_get_security_level(void){ 3226 return hci_stack->gap_security_level; 3227 } 3228 #endif 3229 3230 #ifdef ENABLE_CLASSIC 3231 void gap_set_class_of_device(uint32_t class_of_device){ 3232 hci_stack->class_of_device = class_of_device; 3233 } 3234 3235 void gap_set_default_link_policy_settings(uint16_t default_link_policy_settings){ 3236 hci_stack->default_link_policy_settings = default_link_policy_settings; 3237 } 3238 3239 void gap_set_allow_role_switch(bool allow_role_switch){ 3240 hci_stack->allow_role_switch = allow_role_switch ? 1 : 0; 3241 } 3242 3243 uint8_t hci_get_allow_role_switch(void){ 3244 return hci_stack->allow_role_switch; 3245 } 3246 3247 void gap_set_link_supervision_timeout(uint16_t link_supervision_timeout){ 3248 hci_stack->link_supervision_timeout = link_supervision_timeout; 3249 } 3250 3251 void hci_disable_l2cap_timeout_check(void){ 3252 disable_l2cap_timeouts = 1; 3253 } 3254 #endif 3255 3256 #if !defined(HAVE_PLATFORM_IPHONE_OS) && !defined (HAVE_HOST_CONTROLLER_API) 3257 // Set Public BD ADDR - passed on to Bluetooth chipset if supported in bt_control_h 3258 void hci_set_bd_addr(bd_addr_t addr){ 3259 (void)memcpy(hci_stack->custom_bd_addr, addr, 6); 3260 hci_stack->custom_bd_addr_set = 1; 3261 } 3262 #endif 3263 3264 // State-Module-Driver overview 3265 // state module low-level 3266 // HCI_STATE_OFF off close 3267 // HCI_STATE_INITIALIZING, on open 3268 // HCI_STATE_WORKING, on open 3269 // HCI_STATE_HALTING, on open 3270 // HCI_STATE_SLEEPING, off/sleep close 3271 // HCI_STATE_FALLING_ASLEEP on open 3272 3273 static int hci_power_control_on(void){ 3274 3275 // power on 3276 int err = 0; 3277 if (hci_stack->control && hci_stack->control->on){ 3278 err = (*hci_stack->control->on)(); 3279 } 3280 if (err){ 3281 log_error( "POWER_ON failed"); 3282 hci_emit_hci_open_failed(); 3283 return err; 3284 } 3285 3286 // int chipset driver 3287 if (hci_stack->chipset && hci_stack->chipset->init){ 3288 hci_stack->chipset->init(hci_stack->config); 3289 } 3290 3291 // init transport 3292 if (hci_stack->hci_transport->init){ 3293 hci_stack->hci_transport->init(hci_stack->config); 3294 } 3295 3296 // open transport 3297 err = hci_stack->hci_transport->open(); 3298 if (err){ 3299 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3300 if (hci_stack->control && hci_stack->control->off){ 3301 (*hci_stack->control->off)(); 3302 } 3303 hci_emit_hci_open_failed(); 3304 return err; 3305 } 3306 return 0; 3307 } 3308 3309 static void hci_power_control_off(void){ 3310 3311 log_info("hci_power_control_off"); 3312 3313 // close low-level device 3314 hci_stack->hci_transport->close(); 3315 3316 log_info("hci_power_control_off - hci_transport closed"); 3317 3318 // power off 3319 if (hci_stack->control && hci_stack->control->off){ 3320 (*hci_stack->control->off)(); 3321 } 3322 3323 log_info("hci_power_control_off - control closed"); 3324 3325 hci_stack->state = HCI_STATE_OFF; 3326 } 3327 3328 static void hci_power_control_sleep(void){ 3329 3330 log_info("hci_power_control_sleep"); 3331 3332 #if 0 3333 // don't close serial port during sleep 3334 3335 // close low-level device 3336 hci_stack->hci_transport->close(hci_stack->config); 3337 #endif 3338 3339 // sleep mode 3340 if (hci_stack->control && hci_stack->control->sleep){ 3341 (*hci_stack->control->sleep)(); 3342 } 3343 3344 hci_stack->state = HCI_STATE_SLEEPING; 3345 } 3346 3347 static int hci_power_control_wake(void){ 3348 3349 log_info("hci_power_control_wake"); 3350 3351 // wake on 3352 if (hci_stack->control && hci_stack->control->wake){ 3353 (*hci_stack->control->wake)(); 3354 } 3355 3356 #if 0 3357 // open low-level device 3358 int err = hci_stack->hci_transport->open(hci_stack->config); 3359 if (err){ 3360 log_error( "HCI_INIT failed, turning Bluetooth off again"); 3361 if (hci_stack->control && hci_stack->control->off){ 3362 (*hci_stack->control->off)(); 3363 } 3364 hci_emit_hci_open_failed(); 3365 return err; 3366 } 3367 #endif 3368 3369 return 0; 3370 } 3371 3372 static void hci_power_transition_to_initializing(void){ 3373 // set up state machine 3374 hci_stack->num_cmd_packets = 1; // assume that one cmd can be sent 3375 hci_stack->hci_packet_buffer_reserved = 0; 3376 hci_stack->state = HCI_STATE_INITIALIZING; 3377 hci_stack->substate = HCI_INIT_SEND_RESET; 3378 } 3379 3380 // returns error 3381 static int hci_power_control_state_off(HCI_POWER_MODE power_mode){ 3382 int err; 3383 switch (power_mode){ 3384 case HCI_POWER_ON: 3385 err = hci_power_control_on(); 3386 if (err != 0) { 3387 log_error("hci_power_control_on() error %d", err); 3388 return err; 3389 } 3390 hci_power_transition_to_initializing(); 3391 break; 3392 case HCI_POWER_OFF: 3393 // do nothing 3394 break; 3395 case HCI_POWER_SLEEP: 3396 // do nothing (with SLEEP == OFF) 3397 break; 3398 default: 3399 btstack_assert(false); 3400 break; 3401 } 3402 return ERROR_CODE_SUCCESS; 3403 } 3404 3405 static int hci_power_control_state_initializing(HCI_POWER_MODE power_mode){ 3406 switch (power_mode){ 3407 case HCI_POWER_ON: 3408 // do nothing 3409 break; 3410 case HCI_POWER_OFF: 3411 // no connections yet, just turn it off 3412 hci_power_control_off(); 3413 break; 3414 case HCI_POWER_SLEEP: 3415 // no connections yet, just turn it off 3416 hci_power_control_sleep(); 3417 break; 3418 default: 3419 btstack_assert(false); 3420 break; 3421 } 3422 return ERROR_CODE_SUCCESS; 3423 } 3424 3425 static int hci_power_control_state_working(HCI_POWER_MODE power_mode) { 3426 switch (power_mode){ 3427 case HCI_POWER_ON: 3428 // do nothing 3429 break; 3430 case HCI_POWER_OFF: 3431 // see hci_run 3432 hci_stack->state = HCI_STATE_HALTING; 3433 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3434 break; 3435 case HCI_POWER_SLEEP: 3436 // see hci_run 3437 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3438 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3439 break; 3440 default: 3441 btstack_assert(false); 3442 break; 3443 } 3444 return ERROR_CODE_SUCCESS; 3445 } 3446 3447 static int hci_power_control_state_halting(HCI_POWER_MODE power_mode) { 3448 switch (power_mode){ 3449 case HCI_POWER_ON: 3450 hci_power_transition_to_initializing(); 3451 break; 3452 case HCI_POWER_OFF: 3453 // do nothing 3454 break; 3455 case HCI_POWER_SLEEP: 3456 // see hci_run 3457 hci_stack->state = HCI_STATE_FALLING_ASLEEP; 3458 hci_stack->substate = HCI_FALLING_ASLEEP_DISCONNECT; 3459 break; 3460 default: 3461 btstack_assert(false); 3462 break; 3463 } 3464 return ERROR_CODE_SUCCESS; 3465 } 3466 3467 static int hci_power_control_state_falling_asleep(HCI_POWER_MODE power_mode) { 3468 switch (power_mode){ 3469 case HCI_POWER_ON: 3470 3471 #ifdef HAVE_PLATFORM_IPHONE_OS 3472 // nothing to do, if H4 supports power management 3473 if (btstack_control_iphone_power_management_enabled()){ 3474 hci_stack->state = HCI_STATE_INITIALIZING; 3475 hci_stack->substate = HCI_INIT_WRITE_SCAN_ENABLE; // init after sleep 3476 break; 3477 } 3478 #endif 3479 hci_power_transition_to_initializing(); 3480 break; 3481 case HCI_POWER_OFF: 3482 // see hci_run 3483 hci_stack->state = HCI_STATE_HALTING; 3484 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3485 break; 3486 case HCI_POWER_SLEEP: 3487 // do nothing 3488 break; 3489 default: 3490 btstack_assert(false); 3491 break; 3492 } 3493 return ERROR_CODE_SUCCESS; 3494 } 3495 3496 static int hci_power_control_state_sleeping(HCI_POWER_MODE power_mode) { 3497 int err; 3498 switch (power_mode){ 3499 case HCI_POWER_ON: 3500 #ifdef HAVE_PLATFORM_IPHONE_OS 3501 // nothing to do, if H4 supports power management 3502 if (btstack_control_iphone_power_management_enabled()){ 3503 hci_stack->state = HCI_STATE_INITIALIZING; 3504 hci_stack->substate = HCI_INIT_AFTER_SLEEP; 3505 hci_update_scan_enable(); 3506 break; 3507 } 3508 #endif 3509 err = hci_power_control_wake(); 3510 if (err) return err; 3511 hci_power_transition_to_initializing(); 3512 break; 3513 case HCI_POWER_OFF: 3514 hci_stack->state = HCI_STATE_HALTING; 3515 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_NO_TIMER; 3516 break; 3517 case HCI_POWER_SLEEP: 3518 // do nothing 3519 break; 3520 default: 3521 btstack_assert(false); 3522 break; 3523 } 3524 return ERROR_CODE_SUCCESS; 3525 } 3526 3527 int hci_power_control(HCI_POWER_MODE power_mode){ 3528 log_info("hci_power_control: %d, current mode %u", power_mode, hci_stack->state); 3529 int err; 3530 switch (hci_stack->state){ 3531 case HCI_STATE_OFF: 3532 err = hci_power_control_state_off(power_mode); 3533 break; 3534 case HCI_STATE_INITIALIZING: 3535 err = hci_power_control_state_initializing(power_mode); 3536 break; 3537 case HCI_STATE_WORKING: 3538 err = hci_power_control_state_working(power_mode); 3539 break; 3540 case HCI_STATE_HALTING: 3541 err = hci_power_control_state_halting(power_mode); 3542 break; 3543 case HCI_STATE_FALLING_ASLEEP: 3544 err = hci_power_control_state_falling_asleep(power_mode); 3545 break; 3546 case HCI_STATE_SLEEPING: 3547 err = hci_power_control_state_sleeping(power_mode); 3548 break; 3549 default: 3550 btstack_assert(false); 3551 break; 3552 } 3553 if (err){ 3554 return err; 3555 } 3556 3557 // create internal event 3558 hci_emit_state(); 3559 3560 // trigger next/first action 3561 hci_run(); 3562 3563 return 0; 3564 } 3565 3566 3567 #ifdef ENABLE_CLASSIC 3568 3569 static void hci_update_scan_enable(void){ 3570 // 2 = page scan, 1 = inq scan 3571 hci_stack->new_scan_enable_value = (hci_stack->connectable << 1) | hci_stack->discoverable; 3572 hci_run(); 3573 } 3574 3575 void gap_discoverable_control(uint8_t enable){ 3576 if (enable) enable = 1; // normalize argument 3577 3578 if (hci_stack->discoverable == enable){ 3579 hci_emit_discoverable_enabled(hci_stack->discoverable); 3580 return; 3581 } 3582 3583 hci_stack->discoverable = enable; 3584 hci_update_scan_enable(); 3585 } 3586 3587 void gap_connectable_control(uint8_t enable){ 3588 if (enable) enable = 1; // normalize argument 3589 3590 // don't emit event 3591 if (hci_stack->connectable == enable) return; 3592 3593 hci_stack->connectable = enable; 3594 hci_update_scan_enable(); 3595 } 3596 #endif 3597 3598 void gap_local_bd_addr(bd_addr_t address_buffer){ 3599 (void)memcpy(address_buffer, hci_stack->local_bd_addr, 6); 3600 } 3601 3602 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 3603 static void hci_host_num_completed_packets(void){ 3604 3605 // create packet manually as arrays are not supported and num_commands should not get reduced 3606 hci_reserve_packet_buffer(); 3607 uint8_t * packet = hci_get_outgoing_packet_buffer(); 3608 3609 uint16_t size = 0; 3610 uint16_t num_handles = 0; 3611 packet[size++] = 0x35; 3612 packet[size++] = 0x0c; 3613 size++; // skip param len 3614 size++; // skip num handles 3615 3616 // add { handle, packets } entries 3617 btstack_linked_item_t * it; 3618 for (it = (btstack_linked_item_t *) hci_stack->connections; it ; it = it->next){ 3619 hci_connection_t * connection = (hci_connection_t *) it; 3620 if (connection->num_packets_completed){ 3621 little_endian_store_16(packet, size, connection->con_handle); 3622 size += 2; 3623 little_endian_store_16(packet, size, connection->num_packets_completed); 3624 size += 2; 3625 // 3626 num_handles++; 3627 connection->num_packets_completed = 0; 3628 } 3629 } 3630 3631 packet[2] = size - 3; 3632 packet[3] = num_handles; 3633 3634 hci_stack->host_completed_packets = 0; 3635 3636 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 3637 hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 3638 3639 // release packet buffer for synchronous transport implementations 3640 if (hci_transport_synchronous()){ 3641 hci_release_packet_buffer(); 3642 hci_emit_transport_packet_sent(); 3643 } 3644 } 3645 #endif 3646 3647 static void hci_halting_timeout_handler(btstack_timer_source_t * ds){ 3648 UNUSED(ds); 3649 hci_stack->substate = HCI_HALTING_CLOSE; 3650 // allow packet handlers to defer final shutdown 3651 hci_emit_state(); 3652 hci_run(); 3653 } 3654 3655 static bool hci_run_acl_fragments(void){ 3656 if (hci_stack->acl_fragmentation_total_size > 0u) { 3657 hci_con_handle_t con_handle = READ_ACL_CONNECTION_HANDLE(hci_stack->hci_packet_buffer); 3658 hci_connection_t *connection = hci_connection_for_handle(con_handle); 3659 if (connection) { 3660 if (hci_can_send_prepared_acl_packet_now(con_handle)){ 3661 hci_send_acl_packet_fragments(connection); 3662 return true; 3663 } 3664 } else { 3665 // connection gone -> discard further fragments 3666 log_info("hci_run: fragmented ACL packet no connection -> discard fragment"); 3667 hci_stack->acl_fragmentation_total_size = 0; 3668 hci_stack->acl_fragmentation_pos = 0; 3669 } 3670 } 3671 return false; 3672 } 3673 3674 #ifdef ENABLE_CLASSIC 3675 static bool hci_run_general_gap_classic(void){ 3676 3677 // decline incoming connections 3678 if (hci_stack->decline_reason){ 3679 uint8_t reason = hci_stack->decline_reason; 3680 hci_stack->decline_reason = 0; 3681 hci_send_cmd(&hci_reject_connection_request, hci_stack->decline_addr, reason); 3682 return true; 3683 } 3684 // send scan enable 3685 if ((hci_stack->state == HCI_STATE_WORKING) && (hci_stack->new_scan_enable_value != 0xff) && hci_classic_supported()){ 3686 hci_send_cmd(&hci_write_scan_enable, hci_stack->new_scan_enable_value); 3687 hci_stack->new_scan_enable_value = 0xff; 3688 return true; 3689 } 3690 // start/stop inquiry 3691 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)){ 3692 uint8_t duration = hci_stack->inquiry_state; 3693 hci_stack->inquiry_state = GAP_INQUIRY_STATE_ACTIVE; 3694 hci_send_cmd(&hci_inquiry, GAP_IAC_GENERAL_INQUIRY, duration, 0); 3695 return true; 3696 } 3697 if (hci_stack->inquiry_state == GAP_INQUIRY_STATE_W2_CANCEL){ 3698 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W4_CANCELLED; 3699 hci_send_cmd(&hci_inquiry_cancel); 3700 return true; 3701 } 3702 // remote name request 3703 if (hci_stack->remote_name_state == GAP_REMOTE_NAME_STATE_W2_SEND){ 3704 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W4_COMPLETE; 3705 hci_send_cmd(&hci_remote_name_request, hci_stack->remote_name_addr, 3706 hci_stack->remote_name_page_scan_repetition_mode, 0, hci_stack->remote_name_clock_offset); 3707 return true; 3708 } 3709 // pairing 3710 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE){ 3711 uint8_t state = hci_stack->gap_pairing_state; 3712 hci_stack->gap_pairing_state = GAP_PAIRING_STATE_IDLE; 3713 switch (state){ 3714 case GAP_PAIRING_STATE_SEND_PIN: 3715 hci_send_cmd(&hci_pin_code_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_pin_len, hci_stack->gap_pairing_input.gap_pairing_pin); 3716 break; 3717 case GAP_PAIRING_STATE_SEND_PIN_NEGATIVE: 3718 hci_send_cmd(&hci_pin_code_request_negative_reply, hci_stack->gap_pairing_addr); 3719 break; 3720 case GAP_PAIRING_STATE_SEND_PASSKEY: 3721 hci_send_cmd(&hci_user_passkey_request_reply, hci_stack->gap_pairing_addr, hci_stack->gap_pairing_input.gap_pairing_passkey); 3722 break; 3723 case GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE: 3724 hci_send_cmd(&hci_user_passkey_request_negative_reply, hci_stack->gap_pairing_addr); 3725 break; 3726 case GAP_PAIRING_STATE_SEND_CONFIRMATION: 3727 hci_send_cmd(&hci_user_confirmation_request_reply, hci_stack->gap_pairing_addr); 3728 break; 3729 case GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE: 3730 hci_send_cmd(&hci_user_confirmation_request_negative_reply, hci_stack->gap_pairing_addr); 3731 break; 3732 default: 3733 break; 3734 } 3735 return true; 3736 } 3737 return false; 3738 } 3739 #endif 3740 3741 #ifdef ENABLE_BLE 3742 static bool hci_run_general_gap_le(void){ 3743 3744 // advertisements, active scanning, and creating connections requires random address to be set if using private address 3745 3746 if (hci_stack->state != HCI_STATE_WORKING) return false; 3747 if ( (hci_stack->le_own_addr_type != BD_ADDR_TYPE_LE_PUBLIC) && (hci_stack->le_random_address_set == 0u) ) return false; 3748 3749 3750 // Phase 1: collect what to stop 3751 3752 bool scanning_stop = false; 3753 bool connecting_stop = false; 3754 bool advertising_stop = false; 3755 3756 #ifndef ENABLE_LE_CENTRAL 3757 UNUSED(scanning_stop); 3758 UNUSED(connecting_stop); 3759 #endif 3760 #ifndef ENABLE_LE_PERIPHERAL 3761 UNUSED(advertising_stop); 3762 #endif 3763 3764 // check if whitelist needs modification 3765 bool whitelist_modification_pending = false; 3766 btstack_linked_list_iterator_t lit; 3767 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3768 while (btstack_linked_list_iterator_has_next(&lit)){ 3769 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3770 if (entry->state & (LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER)){ 3771 whitelist_modification_pending = true; 3772 break; 3773 } 3774 } 3775 // check if resolving list needs modification 3776 bool resolving_list_modification_pending = false; 3777 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3778 bool resolving_list_supported = (hci_stack->local_supported_commands[1] & (1 << 2)) != 0; 3779 if (resolving_list_supported && hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_DONE){ 3780 resolving_list_modification_pending = true; 3781 } 3782 #endif 3783 3784 #ifdef ENABLE_LE_CENTRAL 3785 // scanning control 3786 if (hci_stack->le_scanning_active) { 3787 // stop if: 3788 // - parameter change required 3789 // - it's disabled 3790 // - whitelist change required but used for scanning 3791 // - resolving list modified 3792 bool scanning_uses_whitelist = (hci_stack->le_scan_filter_policy & 1) == 1; 3793 if ((hci_stack->le_scanning_param_update) || 3794 !hci_stack->le_scanning_enabled || 3795 scanning_uses_whitelist || 3796 resolving_list_modification_pending){ 3797 3798 scanning_stop = true; 3799 } 3800 } 3801 #endif 3802 3803 #ifdef ENABLE_LE_CENTRAL 3804 // connecting control 3805 bool connecting_with_whitelist; 3806 switch (hci_stack->le_connecting_state){ 3807 case LE_CONNECTING_DIRECT: 3808 case LE_CONNECTING_WHITELIST: 3809 // stop connecting if: 3810 // - connecting uses white and whitelist modification pending 3811 // - if it got disabled 3812 // - resolving list modified 3813 connecting_with_whitelist = hci_stack->le_connecting_state == LE_CONNECTING_WHITELIST; 3814 if ((connecting_with_whitelist && whitelist_modification_pending) || 3815 (hci_stack->le_connecting_request == LE_CONNECTING_IDLE) || 3816 resolving_list_modification_pending) { 3817 3818 connecting_stop = true; 3819 } 3820 break; 3821 default: 3822 break; 3823 } 3824 #endif 3825 3826 #ifdef ENABLE_LE_PERIPHERAL 3827 // le advertisement control 3828 if (hci_stack->le_advertisements_active){ 3829 // stop if: 3830 // - parameter change required 3831 // - it's disabled 3832 // - whitelist change required but used for advertisement filter policy 3833 // - resolving list modified 3834 bool advertising_uses_whitelist = hci_stack->le_advertisements_filter_policy > 0; 3835 if ((hci_stack->le_advertisements_todo != 0) || 3836 !hci_stack->le_advertisements_enabled_for_current_roles || 3837 (advertising_uses_whitelist & whitelist_modification_pending) || 3838 resolving_list_modification_pending) { 3839 3840 advertising_stop = true; 3841 } 3842 } 3843 #endif 3844 3845 3846 // Phase 2: stop everything that should be off during modifications 3847 3848 #ifdef ENABLE_LE_CENTRAL 3849 if (scanning_stop){ 3850 hci_stack->le_scanning_active = false; 3851 hci_send_cmd(&hci_le_set_scan_enable, 0, 0); 3852 return true; 3853 } 3854 #endif 3855 3856 #ifdef ENABLE_LE_CENTRAL 3857 if (connecting_stop){ 3858 hci_send_cmd(&hci_le_create_connection_cancel); 3859 return true; 3860 } 3861 #endif 3862 3863 #ifdef ENABLE_LE_PERIPHERAL 3864 if (advertising_stop){ 3865 hci_stack->le_advertisements_active = false; 3866 hci_send_cmd(&hci_le_set_advertise_enable, 0); 3867 return true; 3868 } 3869 #endif 3870 3871 // Phase 3: modify 3872 3873 #ifdef ENABLE_LE_CENTRAL 3874 if (hci_stack->le_scanning_param_update){ 3875 hci_stack->le_scanning_param_update = false; 3876 hci_send_cmd(&hci_le_set_scan_parameters, hci_stack->le_scan_type, hci_stack->le_scan_interval, hci_stack->le_scan_window, 3877 hci_stack->le_own_addr_type, hci_stack->le_scan_filter_policy); 3878 return true; 3879 } 3880 #endif 3881 3882 #ifdef ENABLE_LE_PERIPHERAL 3883 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_PARAMS){ 3884 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_PARAMS; 3885 hci_send_cmd(&hci_le_set_advertising_parameters, 3886 hci_stack->le_advertisements_interval_min, 3887 hci_stack->le_advertisements_interval_max, 3888 hci_stack->le_advertisements_type, 3889 hci_stack->le_own_addr_type, 3890 hci_stack->le_advertisements_direct_address_type, 3891 hci_stack->le_advertisements_direct_address, 3892 hci_stack->le_advertisements_channel_map, 3893 hci_stack->le_advertisements_filter_policy); 3894 return true; 3895 } 3896 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_ADV_DATA){ 3897 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 3898 uint8_t adv_data_clean[31]; 3899 memset(adv_data_clean, 0, sizeof(adv_data_clean)); 3900 (void)memcpy(adv_data_clean, hci_stack->le_advertisements_data, 3901 hci_stack->le_advertisements_data_len); 3902 btstack_replace_bd_addr_placeholder(adv_data_clean, hci_stack->le_advertisements_data_len, hci_stack->local_bd_addr); 3903 hci_send_cmd(&hci_le_set_advertising_data, hci_stack->le_advertisements_data_len, adv_data_clean); 3904 return true; 3905 } 3906 if (hci_stack->le_advertisements_todo & LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA){ 3907 hci_stack->le_advertisements_todo &= ~LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 3908 uint8_t scan_data_clean[31]; 3909 memset(scan_data_clean, 0, sizeof(scan_data_clean)); 3910 (void)memcpy(scan_data_clean, hci_stack->le_scan_response_data, 3911 hci_stack->le_scan_response_data_len); 3912 btstack_replace_bd_addr_placeholder(scan_data_clean, hci_stack->le_scan_response_data_len, hci_stack->local_bd_addr); 3913 hci_send_cmd(&hci_le_set_scan_response_data, hci_stack->le_scan_response_data_len, scan_data_clean); 3914 return true; 3915 } 3916 #endif 3917 3918 3919 #ifdef ENABLE_LE_CENTRAL 3920 // if connect with whitelist was active and is not cancelled yet, wait until next time 3921 if (hci_stack->le_connecting_state == LE_CONNECTING_CANCEL) return false; 3922 #endif 3923 3924 // LE Whitelist Management 3925 if (whitelist_modification_pending){ 3926 // add/remove entries 3927 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3928 while (btstack_linked_list_iterator_has_next(&lit)){ 3929 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 3930 if (entry->state & LE_WHITELIST_REMOVE_FROM_CONTROLLER){ 3931 entry->state &= ~LE_WHITELIST_REMOVE_FROM_CONTROLLER; 3932 hci_send_cmd(&hci_le_remove_device_from_white_list, entry->address_type, entry->address); 3933 return true; 3934 } 3935 if (entry->state & LE_WHITELIST_ADD_TO_CONTROLLER){ 3936 entry->state &= ~LE_WHITELIST_ADD_TO_CONTROLLER; 3937 entry->state |= LE_WHITELIST_ON_CONTROLLER; 3938 hci_send_cmd(&hci_le_add_device_to_white_list, entry->address_type, entry->address); 3939 return true; 3940 } 3941 if ((entry->state & LE_WHITELIST_ON_CONTROLLER) == 0){ 3942 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 3943 btstack_memory_whitelist_entry_free(entry); 3944 } 3945 } 3946 } 3947 3948 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 3949 // LE Resolving List Management 3950 if (resolving_list_supported) { 3951 uint16_t i; 3952 switch (hci_stack->le_resolving_list_state) { 3953 case LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION: 3954 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 3955 hci_send_cmd(&hci_le_set_address_resolution_enabled, 1); 3956 return true; 3957 case LE_RESOLVING_LIST_READ_SIZE: 3958 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_SEND_CLEAR; 3959 hci_send_cmd(&hci_le_read_resolving_list_size); 3960 return true; 3961 case LE_RESOLVING_LIST_SEND_CLEAR: 3962 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 3963 (void) memset(hci_stack->le_resolving_list_add_entries, 0xff, 3964 sizeof(hci_stack->le_resolving_list_add_entries)); 3965 (void) memset(hci_stack->le_resolving_list_remove_entries, 0, 3966 sizeof(hci_stack->le_resolving_list_remove_entries)); 3967 hci_send_cmd(&hci_le_clear_resolving_list); 3968 return true; 3969 case LE_RESOLVING_LIST_REMOVE_ENTRIES: 3970 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 3971 uint8_t offset = i >> 3; 3972 uint8_t mask = 1 << (i & 7); 3973 if ((hci_stack->le_resolving_list_remove_entries[offset] & mask) == 0) continue; 3974 hci_stack->le_resolving_list_remove_entries[offset] &= ~mask; 3975 bd_addr_t peer_identity_addreses; 3976 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 3977 sm_key_t peer_irk; 3978 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 3979 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 3980 3981 #ifdef ENABLE_LE_WHITELIST_TOUCH_AFTER_RESOLVING_LIST_UPDATE 3982 // trigger whitelist entry 'update' (work around for controller bug) 3983 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 3984 while (btstack_linked_list_iterator_has_next(&lit)) { 3985 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&lit); 3986 if (entry->address_type != peer_identity_addr_type) continue; 3987 if (memcmp(entry->address, peer_identity_addreses, 6) != 0) continue; 3988 log_info("trigger whitelist update %s", bd_addr_to_str(peer_identity_addreses)); 3989 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER | LE_WHITELIST_ADD_TO_CONTROLLER; 3990 } 3991 #endif 3992 3993 hci_send_cmd(&hci_le_remove_device_from_resolving_list, peer_identity_addr_type, 3994 peer_identity_addreses); 3995 return true; 3996 } 3997 3998 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_ADD_ENTRIES; 3999 4000 /* fall through */ 4001 4002 case LE_RESOLVING_LIST_ADD_ENTRIES: 4003 for (i = 0; i < MAX_NUM_RESOLVING_LIST_ENTRIES && i < le_device_db_max_count(); i++) { 4004 uint8_t offset = i >> 3; 4005 uint8_t mask = 1 << (i & 7); 4006 if ((hci_stack->le_resolving_list_add_entries[offset] & mask) == 0) continue; 4007 hci_stack->le_resolving_list_add_entries[offset] &= ~mask; 4008 bd_addr_t peer_identity_addreses; 4009 int peer_identity_addr_type = (int) BD_ADDR_TYPE_UNKNOWN; 4010 sm_key_t peer_irk; 4011 le_device_db_info(i, &peer_identity_addr_type, peer_identity_addreses, peer_irk); 4012 if (peer_identity_addr_type == BD_ADDR_TYPE_UNKNOWN) continue; 4013 const uint8_t *local_irk = gap_get_persistent_irk(); 4014 // command uses format specifier 'P' that stores 16-byte value without flip 4015 uint8_t local_irk_flipped[16]; 4016 uint8_t peer_irk_flipped[16]; 4017 reverse_128(local_irk, local_irk_flipped); 4018 reverse_128(peer_irk, peer_irk_flipped); 4019 hci_send_cmd(&hci_le_add_device_to_resolving_list, peer_identity_addr_type, peer_identity_addreses, 4020 peer_irk_flipped, local_irk_flipped); 4021 return true; 4022 } 4023 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4024 break; 4025 4026 default: 4027 break; 4028 } 4029 } 4030 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_DONE; 4031 #endif 4032 4033 // Phase 4: restore state 4034 4035 #ifdef ENABLE_LE_CENTRAL 4036 // re-start scanning 4037 if ((hci_stack->le_scanning_enabled && !hci_stack->le_scanning_active)){ 4038 hci_stack->le_scanning_active = true; 4039 hci_send_cmd(&hci_le_set_scan_enable, 1, 0); 4040 return true; 4041 } 4042 #endif 4043 4044 #ifdef ENABLE_LE_CENTRAL 4045 // re-start connecting 4046 if ( (hci_stack->le_connecting_state == LE_CONNECTING_IDLE) && (hci_stack->le_connecting_request == LE_CONNECTING_WHITELIST)){ 4047 bd_addr_t null_addr; 4048 memset(null_addr, 0, 6); 4049 hci_send_cmd(&hci_le_create_connection, 4050 hci_stack->le_connection_scan_interval, // scan interval: 60 ms 4051 hci_stack->le_connection_scan_window, // scan interval: 30 ms 4052 1, // use whitelist 4053 0, // peer address type 4054 null_addr, // peer bd addr 4055 hci_stack->le_own_addr_type, // our addr type: 4056 hci_stack->le_connection_interval_min, // conn interval min 4057 hci_stack->le_connection_interval_max, // conn interval max 4058 hci_stack->le_connection_latency, // conn latency 4059 hci_stack->le_supervision_timeout, // conn latency 4060 hci_stack->le_minimum_ce_length, // min ce length 4061 hci_stack->le_maximum_ce_length // max ce length 4062 ); 4063 return true; 4064 } 4065 #endif 4066 4067 #ifdef ENABLE_LE_PERIPHERAL 4068 // re-start advertising 4069 if (hci_stack->le_advertisements_enabled_for_current_roles && !hci_stack->le_advertisements_active){ 4070 // check if advertisements should be enabled given 4071 hci_stack->le_advertisements_active = true; 4072 hci_send_cmd(&hci_le_set_advertise_enable, 1); 4073 return true; 4074 } 4075 #endif 4076 4077 return false; 4078 } 4079 #endif 4080 4081 static bool hci_run_general_pending_commands(void){ 4082 btstack_linked_item_t * it; 4083 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 4084 hci_connection_t * connection = (hci_connection_t *) it; 4085 4086 switch(connection->state){ 4087 case SEND_CREATE_CONNECTION: 4088 switch(connection->address_type){ 4089 #ifdef ENABLE_CLASSIC 4090 case BD_ADDR_TYPE_ACL: 4091 log_info("sending hci_create_connection"); 4092 hci_send_cmd(&hci_create_connection, connection->address, hci_usable_acl_packet_types(), 0, 0, 0, hci_stack->allow_role_switch); 4093 break; 4094 #endif 4095 default: 4096 #ifdef ENABLE_BLE 4097 #ifdef ENABLE_LE_CENTRAL 4098 log_info("sending hci_le_create_connection"); 4099 hci_send_cmd(&hci_le_create_connection, 4100 hci_stack->le_connection_scan_interval, // conn scan interval 4101 hci_stack->le_connection_scan_window, // conn scan windows 4102 0, // don't use whitelist 4103 connection->address_type, // peer address type 4104 connection->address, // peer bd addr 4105 hci_stack->le_own_addr_type, // our addr type: 4106 hci_stack->le_connection_interval_min, // conn interval min 4107 hci_stack->le_connection_interval_max, // conn interval max 4108 hci_stack->le_connection_latency, // conn latency 4109 hci_stack->le_supervision_timeout, // conn latency 4110 hci_stack->le_minimum_ce_length, // min ce length 4111 hci_stack->le_maximum_ce_length // max ce length 4112 ); 4113 connection->state = SENT_CREATE_CONNECTION; 4114 #endif 4115 #endif 4116 break; 4117 } 4118 return true; 4119 4120 #ifdef ENABLE_CLASSIC 4121 case RECEIVED_CONNECTION_REQUEST: 4122 connection->role = HCI_ROLE_SLAVE; 4123 if (connection->address_type == BD_ADDR_TYPE_ACL){ 4124 log_info("sending hci_accept_connection_request"); 4125 connection->state = ACCEPTED_CONNECTION_REQUEST; 4126 hci_send_cmd(&hci_accept_connection_request, connection->address, hci_stack->master_slave_policy); 4127 } 4128 return true; 4129 #endif 4130 4131 #ifdef ENABLE_BLE 4132 #ifdef ENABLE_LE_CENTRAL 4133 case SEND_CANCEL_CONNECTION: 4134 connection->state = SENT_CANCEL_CONNECTION; 4135 hci_send_cmd(&hci_le_create_connection_cancel); 4136 return true; 4137 #endif 4138 #endif 4139 case SEND_DISCONNECT: 4140 connection->state = SENT_DISCONNECT; 4141 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4142 return true; 4143 4144 default: 4145 break; 4146 } 4147 4148 // no further commands if connection is about to get shut down 4149 if (connection->state == SENT_DISCONNECT) continue; 4150 4151 if (connection->authentication_flags & READ_RSSI){ 4152 connectionClearAuthenticationFlags(connection, READ_RSSI); 4153 hci_send_cmd(&hci_read_rssi, connection->con_handle); 4154 return true; 4155 } 4156 4157 #ifdef ENABLE_CLASSIC 4158 4159 if (connection->authentication_flags & WRITE_SUPERVISION_TIMEOUT){ 4160 connectionClearAuthenticationFlags(connection, WRITE_SUPERVISION_TIMEOUT); 4161 hci_send_cmd(&hci_write_link_supervision_timeout, connection->con_handle, hci_stack->link_supervision_timeout); 4162 return true; 4163 } 4164 4165 if (connection->authentication_flags & HANDLE_LINK_KEY_REQUEST){ 4166 log_info("responding to link key request, have link key db: %u", hci_stack->link_key_db != NULL); 4167 connectionClearAuthenticationFlags(connection, HANDLE_LINK_KEY_REQUEST); 4168 4169 link_key_t link_key; 4170 link_key_type_t link_key_type; 4171 bool have_link_key = hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(connection->address, link_key, &link_key_type); 4172 4173 const uint16_t sc_enabled_mask = BONDING_REMOTE_SUPPORTS_SC_HOST | BONDING_REMOTE_SUPPORTS_SC_CONTROLLER; 4174 bool sc_enabled_remote = (connection->bonding_flags & sc_enabled_mask) == sc_enabled_mask; 4175 bool sc_downgrade = have_link_key && (gap_secure_connection_for_link_key_type(link_key_type) == 1) && !sc_enabled_remote; 4176 if (sc_downgrade){ 4177 log_info("Link key based on SC, but remote does not support SC -> disconnect"); 4178 connection->state = SENT_DISCONNECT; 4179 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4180 return true; 4181 } 4182 4183 bool security_level_sufficient = have_link_key && (gap_security_level_for_link_key_type(link_key_type) >= connection->requested_security_level); 4184 if (have_link_key && security_level_sufficient){ 4185 connection->link_key_type = link_key_type; 4186 hci_send_cmd(&hci_link_key_request_reply, connection->address, &link_key); 4187 } else { 4188 hci_send_cmd(&hci_link_key_request_negative_reply, connection->address); 4189 } 4190 return true; 4191 } 4192 4193 if (connection->authentication_flags & DENY_PIN_CODE_REQUEST){ 4194 log_info("denying to pin request"); 4195 connectionClearAuthenticationFlags(connection, DENY_PIN_CODE_REQUEST); 4196 hci_send_cmd(&hci_pin_code_request_negative_reply, connection->address); 4197 return true; 4198 } 4199 4200 if (connection->authentication_flags & SEND_IO_CAPABILITIES_REPLY){ 4201 connectionClearAuthenticationFlags(connection, SEND_IO_CAPABILITIES_REPLY); 4202 log_info("IO Capability Request received, stack bondable %u, io cap %u", hci_stack->bondable, hci_stack->ssp_io_capability); 4203 if (hci_stack->bondable && (hci_stack->ssp_io_capability != SSP_IO_CAPABILITY_UNKNOWN)){ 4204 // tweak authentication requirements 4205 uint8_t authreq = hci_stack->ssp_authentication_requirement; 4206 if (connection->bonding_flags & BONDING_DEDICATED){ 4207 authreq = SSP_IO_AUTHREQ_MITM_PROTECTION_NOT_REQUIRED_DEDICATED_BONDING; 4208 } 4209 if (gap_mitm_protection_required_for_security_level(connection->requested_security_level)){ 4210 authreq |= 1; 4211 } 4212 uint8_t have_oob_data = 0; 4213 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4214 if (connection->classic_oob_c_192 != NULL){ 4215 have_oob_data |= 1; 4216 } 4217 if (connection->classic_oob_c_256 != NULL){ 4218 have_oob_data |= 2; 4219 } 4220 #endif 4221 hci_send_cmd(&hci_io_capability_request_reply, &connection->address, hci_stack->ssp_io_capability, have_oob_data, authreq); 4222 } else { 4223 hci_send_cmd(&hci_io_capability_request_negative_reply, &connection->address, ERROR_CODE_PAIRING_NOT_ALLOWED); 4224 } 4225 return true; 4226 } 4227 4228 #ifdef ENABLE_CLASSIC_PAIRING_OOB 4229 if (connection->authentication_flags & SEND_REMOTE_OOB_DATA_REPLY){ 4230 connectionClearAuthenticationFlags(connection, SEND_REMOTE_OOB_DATA_REPLY); 4231 const uint8_t zero[16] = { 0 }; 4232 const uint8_t * r_192 = zero; 4233 const uint8_t * c_192 = zero; 4234 const uint8_t * r_256 = zero; 4235 const uint8_t * c_256 = zero; 4236 // verify P-256 OOB 4237 if ((connection->classic_oob_c_256 != NULL) && ((hci_stack->local_supported_commands[1] & 0x08u) != 0)) { 4238 c_256 = connection->classic_oob_c_256; 4239 if (connection->classic_oob_r_256 != NULL) { 4240 r_256 = connection->classic_oob_r_256; 4241 } 4242 } 4243 // verify P-192 OOB 4244 if ((connection->classic_oob_c_192 != NULL)) { 4245 c_192 = connection->classic_oob_c_192; 4246 if (connection->classic_oob_r_192 != NULL) { 4247 r_192 = connection->classic_oob_r_192; 4248 } 4249 } 4250 // Reply 4251 if (c_256 != zero) { 4252 hci_send_cmd(&hci_remote_oob_extended_data_request_reply, &connection->address, c_192, r_192, c_256, r_256); 4253 } else if (c_192 != zero){ 4254 hci_send_cmd(&hci_remote_oob_data_request_reply, &connection->address, c_192, r_192); 4255 } else { 4256 hci_send_cmd(&hci_remote_oob_data_request_negative_reply, &connection->address); 4257 } 4258 return true; 4259 } 4260 #endif 4261 4262 if (connection->authentication_flags & SEND_USER_CONFIRM_REPLY){ 4263 connectionClearAuthenticationFlags(connection, SEND_USER_CONFIRM_REPLY); 4264 hci_send_cmd(&hci_user_confirmation_request_reply, &connection->address); 4265 return true; 4266 } 4267 4268 if (connection->authentication_flags & SEND_USER_PASSKEY_REPLY){ 4269 connectionClearAuthenticationFlags(connection, SEND_USER_PASSKEY_REPLY); 4270 hci_send_cmd(&hci_user_passkey_request_reply, &connection->address, 000000); 4271 return true; 4272 } 4273 4274 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_0){ 4275 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_0; 4276 hci_send_cmd(&hci_read_remote_supported_features_command, connection->con_handle); 4277 return true; 4278 } 4279 4280 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_1){ 4281 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_1; 4282 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 1); 4283 return true; 4284 } 4285 4286 if (connection->bonding_flags & BONDING_REQUEST_REMOTE_FEATURES_PAGE_2){ 4287 connection->bonding_flags &= ~BONDING_REQUEST_REMOTE_FEATURES_PAGE_2; 4288 hci_send_cmd(&hci_read_remote_extended_features_command, connection->con_handle, 2); 4289 return true; 4290 } 4291 4292 if (connection->bonding_flags & BONDING_DISCONNECT_DEDICATED_DONE){ 4293 connection->bonding_flags &= ~BONDING_DISCONNECT_DEDICATED_DONE; 4294 connection->bonding_flags |= BONDING_EMIT_COMPLETE_ON_DISCONNECT; 4295 connection->state = SENT_DISCONNECT; 4296 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4297 return true; 4298 } 4299 4300 if (connection->bonding_flags & BONDING_SEND_AUTHENTICATE_REQUEST){ 4301 connection->bonding_flags &= ~BONDING_SEND_AUTHENTICATE_REQUEST; 4302 connection->bonding_flags |= BONDING_SENT_AUTHENTICATE_REQUEST; 4303 hci_send_cmd(&hci_authentication_requested, connection->con_handle); 4304 return true; 4305 } 4306 4307 if (connection->bonding_flags & BONDING_SEND_ENCRYPTION_REQUEST){ 4308 connection->bonding_flags &= ~BONDING_SEND_ENCRYPTION_REQUEST; 4309 hci_send_cmd(&hci_set_connection_encryption, connection->con_handle, 1); 4310 return true; 4311 } 4312 if (connection->bonding_flags & BONDING_SEND_READ_ENCRYPTION_KEY_SIZE){ 4313 connection->bonding_flags &= ~BONDING_SEND_READ_ENCRYPTION_KEY_SIZE; 4314 hci_send_cmd(&hci_read_encryption_key_size, connection->con_handle, 1); 4315 return true; 4316 } 4317 #endif 4318 4319 if (connection->bonding_flags & BONDING_DISCONNECT_SECURITY_BLOCK){ 4320 connection->bonding_flags &= ~BONDING_DISCONNECT_SECURITY_BLOCK; 4321 if (connection->state != SENT_DISCONNECT){ 4322 connection->state = SENT_DISCONNECT; 4323 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_AUTHENTICATION_FAILURE); 4324 return true; 4325 } 4326 } 4327 4328 #ifdef ENABLE_CLASSIC 4329 uint16_t sniff_min_interval; 4330 switch (connection->sniff_min_interval){ 4331 case 0: 4332 break; 4333 case 0xffff: 4334 connection->sniff_min_interval = 0; 4335 hci_send_cmd(&hci_exit_sniff_mode, connection->con_handle); 4336 return true; 4337 default: 4338 sniff_min_interval = connection->sniff_min_interval; 4339 connection->sniff_min_interval = 0; 4340 hci_send_cmd(&hci_sniff_mode, connection->con_handle, connection->sniff_max_interval, sniff_min_interval, connection->sniff_attempt, connection->sniff_timeout); 4341 return true; 4342 } 4343 4344 if (connection->request_role != HCI_ROLE_INVALID){ 4345 hci_role_t role = connection->request_role; 4346 connection->request_role = HCI_ROLE_INVALID; 4347 hci_send_cmd(&hci_switch_role_command, connection->address, role); 4348 return true; 4349 } 4350 #endif 4351 4352 #ifdef ENABLE_BLE 4353 switch (connection->le_con_parameter_update_state){ 4354 // response to L2CAP CON PARAMETER UPDATE REQUEST 4355 case CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS: 4356 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4357 hci_send_cmd(&hci_le_connection_update, connection->con_handle, connection->le_conn_interval_min, 4358 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4359 0x0000, 0xffff); 4360 return true; 4361 case CON_PARAMETER_UPDATE_REPLY: 4362 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4363 hci_send_cmd(&hci_le_remote_connection_parameter_request_reply, connection->con_handle, connection->le_conn_interval_min, 4364 connection->le_conn_interval_max, connection->le_conn_latency, connection->le_supervision_timeout, 4365 0x0000, 0xffff); 4366 return true; 4367 case CON_PARAMETER_UPDATE_NEGATIVE_REPLY: 4368 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_NONE; 4369 hci_send_cmd(&hci_le_remote_connection_parameter_request_negative_reply, ERROR_CODE_UNSUPPORTED_LMP_PARAMETER_VALUE_UNSUPPORTED_LL_PARAMETER_VALUE); 4370 return true; 4371 default: 4372 break; 4373 } 4374 if (connection->le_phy_update_all_phys != 0xffu){ 4375 uint8_t all_phys = connection->le_phy_update_all_phys; 4376 connection->le_phy_update_all_phys = 0xff; 4377 hci_send_cmd(&hci_le_set_phy, connection->con_handle, all_phys, connection->le_phy_update_tx_phys, connection->le_phy_update_rx_phys, connection->le_phy_update_phy_options); 4378 return true; 4379 } 4380 #endif 4381 } 4382 return false; 4383 } 4384 4385 static void hci_run(void){ 4386 4387 bool done; 4388 4389 // send continuation fragments first, as they block the prepared packet buffer 4390 done = hci_run_acl_fragments(); 4391 if (done) return; 4392 4393 #ifdef ENABLE_HCI_CONTROLLER_TO_HOST_FLOW_CONTROL 4394 // send host num completed packets next as they don't require num_cmd_packets > 0 4395 if (!hci_can_send_comand_packet_transport()) return; 4396 if (hci_stack->host_completed_packets){ 4397 hci_host_num_completed_packets(); 4398 return; 4399 } 4400 #endif 4401 4402 if (!hci_can_send_command_packet_now()) return; 4403 4404 // global/non-connection oriented commands 4405 4406 4407 #ifdef ENABLE_CLASSIC 4408 // general gap classic 4409 done = hci_run_general_gap_classic(); 4410 if (done) return; 4411 #endif 4412 4413 #ifdef ENABLE_BLE 4414 // general gap le 4415 done = hci_run_general_gap_le(); 4416 if (done) return; 4417 #endif 4418 4419 // send pending HCI commands 4420 done = hci_run_general_pending_commands(); 4421 if (done) return; 4422 4423 // stack state sub statemachines 4424 hci_connection_t * connection; 4425 switch (hci_stack->state){ 4426 case HCI_STATE_INITIALIZING: 4427 hci_initializing_run(); 4428 break; 4429 4430 case HCI_STATE_HALTING: 4431 4432 log_info("HCI_STATE_HALTING, substate %x\n", hci_stack->substate); 4433 switch (hci_stack->substate){ 4434 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 4435 case HCI_HALTING_DISCONNECT_ALL_TIMER: 4436 4437 #ifdef ENABLE_BLE 4438 #ifdef ENABLE_LE_CENTRAL 4439 // free whitelist entries 4440 { 4441 btstack_linked_list_iterator_t lit; 4442 btstack_linked_list_iterator_init(&lit, &hci_stack->le_whitelist); 4443 while (btstack_linked_list_iterator_has_next(&lit)){ 4444 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&lit); 4445 btstack_linked_list_remove(&hci_stack->le_whitelist, (btstack_linked_item_t *) entry); 4446 btstack_memory_whitelist_entry_free(entry); 4447 } 4448 } 4449 #endif 4450 #endif 4451 // close all open connections 4452 connection = (hci_connection_t *) hci_stack->connections; 4453 if (connection){ 4454 hci_con_handle_t con_handle = (uint16_t) connection->con_handle; 4455 if (!hci_can_send_command_packet_now()) return; 4456 4457 // check state 4458 if (connection->state == SENT_DISCONNECT) return; 4459 connection->state = SENT_DISCONNECT; 4460 4461 log_info("HCI_STATE_HALTING, connection %p, handle %u", connection, con_handle); 4462 4463 // cancel all l2cap connections right away instead of waiting for disconnection complete event ... 4464 hci_emit_disconnection_complete(con_handle, 0x16); // terminated by local host 4465 4466 // ... which would be ignored anyway as we shutdown (free) the connection now 4467 hci_shutdown_connection(connection); 4468 4469 // finally, send the disconnect command 4470 hci_send_cmd(&hci_disconnect, con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4471 return; 4472 } 4473 4474 if (hci_stack->substate == HCI_HALTING_DISCONNECT_ALL_TIMER){ 4475 // no connections left, wait a bit to assert that btstack_cyrpto isn't waiting for an HCI event 4476 log_info("HCI_STATE_HALTING: wait 50 ms"); 4477 hci_stack->substate = HCI_HALTING_W4_TIMER; 4478 btstack_run_loop_set_timer(&hci_stack->timeout, 50); 4479 btstack_run_loop_set_timer_handler(&hci_stack->timeout, hci_halting_timeout_handler); 4480 btstack_run_loop_add_timer(&hci_stack->timeout); 4481 break; 4482 } 4483 4484 /* fall through */ 4485 4486 case HCI_HALTING_CLOSE: 4487 log_info("HCI_STATE_HALTING, calling off"); 4488 4489 // switch mode 4490 hci_power_control_off(); 4491 4492 log_info("HCI_STATE_HALTING, emitting state"); 4493 hci_emit_state(); 4494 log_info("HCI_STATE_HALTING, done"); 4495 break; 4496 4497 case HCI_HALTING_W4_TIMER: 4498 // keep waiting 4499 4500 break; 4501 default: 4502 break; 4503 } 4504 4505 break; 4506 4507 case HCI_STATE_FALLING_ASLEEP: 4508 switch(hci_stack->substate) { 4509 case HCI_FALLING_ASLEEP_DISCONNECT: 4510 log_info("HCI_STATE_FALLING_ASLEEP"); 4511 // close all open connections 4512 connection = (hci_connection_t *) hci_stack->connections; 4513 4514 #ifdef HAVE_PLATFORM_IPHONE_OS 4515 // don't close connections, if H4 supports power management 4516 if (btstack_control_iphone_power_management_enabled()){ 4517 connection = NULL; 4518 } 4519 #endif 4520 if (connection){ 4521 4522 // send disconnect 4523 if (!hci_can_send_command_packet_now()) return; 4524 4525 log_info("HCI_STATE_FALLING_ASLEEP, connection %p, handle %u", connection, (uint16_t)connection->con_handle); 4526 hci_send_cmd(&hci_disconnect, connection->con_handle, ERROR_CODE_REMOTE_USER_TERMINATED_CONNECTION); 4527 4528 // send disconnected event right away - causes higher layer connections to get closed, too. 4529 hci_shutdown_connection(connection); 4530 return; 4531 } 4532 4533 if (hci_classic_supported()){ 4534 // disable page and inquiry scan 4535 if (!hci_can_send_command_packet_now()) return; 4536 4537 log_info("HCI_STATE_HALTING, disabling inq scans"); 4538 hci_send_cmd(&hci_write_scan_enable, hci_stack->connectable << 1); // drop inquiry scan but keep page scan 4539 4540 // continue in next sub state 4541 hci_stack->substate = HCI_FALLING_ASLEEP_W4_WRITE_SCAN_ENABLE; 4542 break; 4543 } 4544 4545 /* fall through */ 4546 4547 case HCI_FALLING_ASLEEP_COMPLETE: 4548 log_info("HCI_STATE_HALTING, calling sleep"); 4549 #ifdef HAVE_PLATFORM_IPHONE_OS 4550 // don't actually go to sleep, if H4 supports power management 4551 if (btstack_control_iphone_power_management_enabled()){ 4552 // SLEEP MODE reached 4553 hci_stack->state = HCI_STATE_SLEEPING; 4554 hci_emit_state(); 4555 break; 4556 } 4557 #endif 4558 // switch mode 4559 hci_power_control_sleep(); // changes hci_stack->state to SLEEP 4560 hci_emit_state(); 4561 break; 4562 4563 default: 4564 break; 4565 } 4566 break; 4567 4568 default: 4569 break; 4570 } 4571 } 4572 4573 int hci_send_cmd_packet(uint8_t *packet, int size){ 4574 // house-keeping 4575 4576 #ifdef ENABLE_CLASSIC 4577 bd_addr_t addr; 4578 hci_connection_t * conn; 4579 #endif 4580 #ifdef ENABLE_LE_CENTRAL 4581 uint8_t initiator_filter_policy; 4582 #endif 4583 4584 uint16_t opcode = little_endian_read_16(packet, 0); 4585 switch (opcode) { 4586 case HCI_OPCODE_HCI_WRITE_LOOPBACK_MODE: 4587 hci_stack->loopback_mode = packet[3]; 4588 break; 4589 4590 #ifdef ENABLE_CLASSIC 4591 case HCI_OPCODE_HCI_CREATE_CONNECTION: 4592 reverse_bd_addr(&packet[3], addr); 4593 log_info("Create_connection to %s", bd_addr_to_str(addr)); 4594 4595 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4596 if (!conn) { 4597 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4598 if (!conn) { 4599 // notify client that alloc failed 4600 hci_emit_connection_complete(addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 4601 return -1; // packet not sent to controller 4602 } 4603 conn->state = SEND_CREATE_CONNECTION; 4604 conn->role = HCI_ROLE_MASTER; 4605 } 4606 log_info("conn state %u", conn->state); 4607 switch (conn->state) { 4608 // if connection active exists 4609 case OPEN: 4610 // and OPEN, emit connection complete command 4611 hci_emit_connection_complete(addr, conn->con_handle, 0); 4612 return -1; // packet not sent to controller 4613 case RECEIVED_DISCONNECTION_COMPLETE: 4614 // create connection triggered in disconnect complete event, let's do it now 4615 break; 4616 case SEND_CREATE_CONNECTION: 4617 // connection created by hci, e.g. dedicated bonding, but not executed yet, let's do it now 4618 break; 4619 default: 4620 // otherwise, just ignore as it is already in the open process 4621 return -1; // packet not sent to controller 4622 } 4623 conn->state = SENT_CREATE_CONNECTION; 4624 4625 // track outgoing connection 4626 hci_stack->outgoing_addr_type = BD_ADDR_TYPE_ACL; 4627 (void) memcpy(hci_stack->outgoing_addr, addr, 6); 4628 break; 4629 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_REPLY: 4630 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_REPLY); 4631 break; 4632 case HCI_OPCODE_HCI_LINK_KEY_REQUEST_NEGATIVE_REPLY: 4633 hci_add_connection_flags_for_flipped_bd_addr(&packet[3], SENT_LINK_KEY_NEGATIVE_REQUEST); 4634 break; 4635 case HCI_OPCODE_HCI_DELETE_STORED_LINK_KEY: 4636 if (hci_stack->link_key_db) { 4637 reverse_bd_addr(&packet[3], addr); 4638 hci_stack->link_key_db->delete_link_key(addr); 4639 } 4640 break; 4641 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_NEGATIVE_REPLY: 4642 case HCI_OPCODE_HCI_PIN_CODE_REQUEST_REPLY: 4643 reverse_bd_addr(&packet[3], addr); 4644 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4645 if (conn) { 4646 connectionClearAuthenticationFlags(conn, LEGACY_PAIRING_ACTIVE); 4647 } 4648 break; 4649 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_NEGATIVE_REPLY: 4650 case HCI_OPCODE_HCI_USER_CONFIRMATION_REQUEST_REPLY: 4651 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_NEGATIVE_REPLY: 4652 case HCI_OPCODE_HCI_USER_PASSKEY_REQUEST_REPLY: 4653 reverse_bd_addr(&packet[3], addr); 4654 conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 4655 if (conn) { 4656 connectionClearAuthenticationFlags(conn, SSP_PAIRING_ACTIVE); 4657 } 4658 break; 4659 4660 #ifdef ENABLE_SCO_OVER_HCI 4661 case HCI_OPCODE_HCI_SETUP_SYNCHRONOUS_CONNECTION: 4662 // setup_synchronous_connection? Voice setting at offset 22 4663 // TODO: compare to current setting if sco connection already active 4664 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 15); 4665 break; 4666 case HCI_OPCODE_HCI_ACCEPT_SYNCHRONOUS_CONNECTION: 4667 // accept_synchronus_connection? Voice setting at offset 18 4668 // TODO: compare to current setting if sco connection already active 4669 hci_stack->sco_voice_setting_active = little_endian_read_16(packet, 19); 4670 break; 4671 #endif 4672 #endif 4673 4674 #ifdef ENABLE_BLE 4675 case HCI_OPCODE_HCI_LE_SET_RANDOM_ADDRESS: 4676 hci_stack->le_random_address_set = 1; 4677 reverse_bd_addr(&packet[3], hci_stack->le_random_address); 4678 break; 4679 #ifdef ENABLE_LE_PERIPHERAL 4680 case HCI_OPCODE_HCI_LE_SET_ADVERTISE_ENABLE: 4681 hci_stack->le_advertisements_active = packet[3] != 0; 4682 break; 4683 #endif 4684 #ifdef ENABLE_LE_CENTRAL 4685 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION: 4686 // white list used? 4687 initiator_filter_policy = packet[7]; 4688 switch (initiator_filter_policy) { 4689 case 0: 4690 // whitelist not used 4691 hci_stack->le_connecting_state = LE_CONNECTING_DIRECT; 4692 break; 4693 case 1: 4694 hci_stack->le_connecting_state = LE_CONNECTING_WHITELIST; 4695 break; 4696 default: 4697 log_error("Invalid initiator_filter_policy in LE Create Connection %u", initiator_filter_policy); 4698 break; 4699 } 4700 // track outgoing connection 4701 hci_stack->outgoing_addr_type = (bd_addr_type_t) packet[8]; // peer addres type 4702 reverse_bd_addr( &packet[9], hci_stack->outgoing_addr); // peer address 4703 break; 4704 case HCI_OPCODE_HCI_LE_CREATE_CONNECTION_CANCEL: 4705 hci_stack->le_connecting_state = LE_CONNECTING_CANCEL; 4706 break; 4707 #endif 4708 #endif 4709 default: 4710 break; 4711 } 4712 4713 hci_stack->num_cmd_packets--; 4714 4715 hci_dump_packet(HCI_COMMAND_DATA_PACKET, 0, packet, size); 4716 return hci_stack->hci_transport->send_packet(HCI_COMMAND_DATA_PACKET, packet, size); 4717 } 4718 4719 // disconnect because of security block 4720 void hci_disconnect_security_block(hci_con_handle_t con_handle){ 4721 hci_connection_t * connection = hci_connection_for_handle(con_handle); 4722 if (!connection) return; 4723 connection->bonding_flags |= BONDING_DISCONNECT_SECURITY_BLOCK; 4724 } 4725 4726 4727 // Configure Secure Simple Pairing 4728 4729 #ifdef ENABLE_CLASSIC 4730 4731 // enable will enable SSP during init 4732 void gap_ssp_set_enable(int enable){ 4733 hci_stack->ssp_enable = enable; 4734 } 4735 4736 static int hci_local_ssp_activated(void){ 4737 return gap_ssp_supported() && hci_stack->ssp_enable; 4738 } 4739 4740 // if set, BTstack will respond to io capability request using authentication requirement 4741 void gap_ssp_set_io_capability(int io_capability){ 4742 hci_stack->ssp_io_capability = io_capability; 4743 } 4744 void gap_ssp_set_authentication_requirement(int authentication_requirement){ 4745 hci_stack->ssp_authentication_requirement = authentication_requirement; 4746 } 4747 4748 // if set, BTstack will confirm a numberic comparion and enter '000000' if requested 4749 void gap_ssp_set_auto_accept(int auto_accept){ 4750 hci_stack->ssp_auto_accept = auto_accept; 4751 } 4752 4753 void gap_secure_connections_enable(bool enable){ 4754 hci_stack->secure_connections_enable = enable; 4755 } 4756 4757 #endif 4758 4759 // va_list part of hci_send_cmd 4760 int hci_send_cmd_va_arg(const hci_cmd_t *cmd, va_list argptr){ 4761 if (!hci_can_send_command_packet_now()){ 4762 log_error("hci_send_cmd called but cannot send packet now"); 4763 return 0; 4764 } 4765 4766 // for HCI INITIALIZATION 4767 // log_info("hci_send_cmd: opcode %04x", cmd->opcode); 4768 hci_stack->last_cmd_opcode = cmd->opcode; 4769 4770 hci_reserve_packet_buffer(); 4771 uint8_t * packet = hci_stack->hci_packet_buffer; 4772 uint16_t size = hci_cmd_create_from_template(packet, cmd, argptr); 4773 int err = hci_send_cmd_packet(packet, size); 4774 4775 // release packet buffer on error or for synchronous transport implementations 4776 if ((err < 0) || hci_transport_synchronous()){ 4777 hci_release_packet_buffer(); 4778 hci_emit_transport_packet_sent(); 4779 } 4780 4781 return err; 4782 } 4783 4784 /** 4785 * pre: numcmds >= 0 - it's allowed to send a command to the controller 4786 */ 4787 int hci_send_cmd(const hci_cmd_t *cmd, ...){ 4788 va_list argptr; 4789 va_start(argptr, cmd); 4790 int res = hci_send_cmd_va_arg(cmd, argptr); 4791 va_end(argptr); 4792 return res; 4793 } 4794 4795 // Create various non-HCI events. 4796 // TODO: generalize, use table similar to hci_create_command 4797 4798 static void hci_emit_event(uint8_t * event, uint16_t size, int dump){ 4799 // dump packet 4800 if (dump) { 4801 hci_dump_packet( HCI_EVENT_PACKET, 0, event, size); 4802 } 4803 4804 // dispatch to all event handlers 4805 btstack_linked_list_iterator_t it; 4806 btstack_linked_list_iterator_init(&it, &hci_stack->event_handlers); 4807 while (btstack_linked_list_iterator_has_next(&it)){ 4808 btstack_packet_callback_registration_t * entry = (btstack_packet_callback_registration_t*) btstack_linked_list_iterator_next(&it); 4809 entry->callback(HCI_EVENT_PACKET, 0, event, size); 4810 } 4811 } 4812 4813 static void hci_emit_acl_packet(uint8_t * packet, uint16_t size){ 4814 if (!hci_stack->acl_packet_handler) return; 4815 hci_stack->acl_packet_handler(HCI_ACL_DATA_PACKET, 0, packet, size); 4816 } 4817 4818 #ifdef ENABLE_CLASSIC 4819 static void hci_notify_if_sco_can_send_now(void){ 4820 // notify SCO sender if waiting 4821 if (!hci_stack->sco_waiting_for_can_send_now) return; 4822 if (hci_can_send_sco_packet_now()){ 4823 hci_stack->sco_waiting_for_can_send_now = 0; 4824 uint8_t event[2] = { HCI_EVENT_SCO_CAN_SEND_NOW, 0 }; 4825 hci_dump_packet(HCI_EVENT_PACKET, 1, event, sizeof(event)); 4826 hci_stack->sco_packet_handler(HCI_EVENT_PACKET, 0, event, sizeof(event)); 4827 } 4828 } 4829 4830 // parsing end emitting has been merged to reduce code size 4831 static void gap_inquiry_explode(uint8_t *packet, uint16_t size) { 4832 uint8_t event[19+GAP_INQUIRY_MAX_NAME_LEN]; 4833 4834 uint8_t * eir_data; 4835 ad_context_t context; 4836 const uint8_t * name; 4837 uint8_t name_len; 4838 4839 if (size < 3) return; 4840 4841 int event_type = hci_event_packet_get_type(packet); 4842 int num_reserved_fields = (event_type == HCI_EVENT_INQUIRY_RESULT) ? 2 : 1; // 2 for old event, 1 otherwise 4843 int num_responses = hci_event_inquiry_result_get_num_responses(packet); 4844 4845 switch (event_type){ 4846 case HCI_EVENT_INQUIRY_RESULT: 4847 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4848 if (size != (3 + (num_responses * 14))) return; 4849 break; 4850 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4851 if (size != 257) return; 4852 if (num_responses != 1) return; 4853 break; 4854 default: 4855 return; 4856 } 4857 4858 // event[1] is set at the end 4859 int i; 4860 for (i=0; i<num_responses;i++){ 4861 memset(event, 0, sizeof(event)); 4862 event[0] = GAP_EVENT_INQUIRY_RESULT; 4863 uint8_t event_size = 18; // if name is not set by EIR 4864 4865 (void)memcpy(&event[2], &packet[3 + (i * 6)], 6); // bd_addr 4866 event[8] = packet[3 + (num_responses*(6)) + (i*1)]; // page_scan_repetition_mode 4867 (void)memcpy(&event[9], 4868 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields)) + (i * 3)], 4869 3); // class of device 4870 (void)memcpy(&event[12], 4871 &packet[3 + (num_responses * (6 + 1 + num_reserved_fields + 3)) + (i * 2)], 4872 2); // clock offset 4873 4874 switch (event_type){ 4875 case HCI_EVENT_INQUIRY_RESULT: 4876 // 14,15,16,17 = 0, size 18 4877 break; 4878 case HCI_EVENT_INQUIRY_RESULT_WITH_RSSI: 4879 event[14] = 1; 4880 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4881 // 16,17 = 0, size 18 4882 break; 4883 case HCI_EVENT_EXTENDED_INQUIRY_RESPONSE: 4884 event[14] = 1; 4885 event[15] = packet [3 + (num_responses*(6+1+num_reserved_fields+3+2)) + (i*1)]; // rssi 4886 // EIR packets only contain a single inquiry response 4887 eir_data = &packet[3 + (6+1+num_reserved_fields+3+2+1)]; 4888 name = NULL; 4889 // Iterate over EIR data 4890 for (ad_iterator_init(&context, EXTENDED_INQUIRY_RESPONSE_DATA_LEN, eir_data) ; ad_iterator_has_more(&context) ; ad_iterator_next(&context)){ 4891 uint8_t data_type = ad_iterator_get_data_type(&context); 4892 uint8_t data_size = ad_iterator_get_data_len(&context); 4893 const uint8_t * data = ad_iterator_get_data(&context); 4894 // Prefer Complete Local Name over Shortend Local Name 4895 switch (data_type){ 4896 case BLUETOOTH_DATA_TYPE_SHORTENED_LOCAL_NAME: 4897 if (name) continue; 4898 /* fall through */ 4899 case BLUETOOTH_DATA_TYPE_COMPLETE_LOCAL_NAME: 4900 name = data; 4901 name_len = data_size; 4902 break; 4903 default: 4904 break; 4905 } 4906 } 4907 if (name){ 4908 event[16] = 1; 4909 // truncate name if needed 4910 int len = btstack_min(name_len, GAP_INQUIRY_MAX_NAME_LEN); 4911 event[17] = len; 4912 (void)memcpy(&event[18], name, len); 4913 event_size += len; 4914 } 4915 break; 4916 default: 4917 return; 4918 } 4919 event[1] = event_size - 2; 4920 hci_emit_event(event, event_size, 1); 4921 } 4922 } 4923 #endif 4924 4925 void hci_emit_state(void){ 4926 log_info("BTSTACK_EVENT_STATE %u", hci_stack->state); 4927 uint8_t event[3]; 4928 event[0] = BTSTACK_EVENT_STATE; 4929 event[1] = sizeof(event) - 2u; 4930 event[2] = hci_stack->state; 4931 hci_emit_event(event, sizeof(event), 1); 4932 } 4933 4934 #ifdef ENABLE_CLASSIC 4935 static void hci_emit_connection_complete(bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4936 uint8_t event[13]; 4937 event[0] = HCI_EVENT_CONNECTION_COMPLETE; 4938 event[1] = sizeof(event) - 2; 4939 event[2] = status; 4940 little_endian_store_16(event, 3, con_handle); 4941 reverse_bd_addr(address, &event[5]); 4942 event[11] = 1; // ACL connection 4943 event[12] = 0; // encryption disabled 4944 hci_emit_event(event, sizeof(event), 1); 4945 } 4946 static void hci_emit_l2cap_check_timeout(hci_connection_t *conn){ 4947 if (disable_l2cap_timeouts) return; 4948 log_info("L2CAP_EVENT_TIMEOUT_CHECK"); 4949 uint8_t event[4]; 4950 event[0] = L2CAP_EVENT_TIMEOUT_CHECK; 4951 event[1] = sizeof(event) - 2; 4952 little_endian_store_16(event, 2, conn->con_handle); 4953 hci_emit_event(event, sizeof(event), 1); 4954 } 4955 #endif 4956 4957 #ifdef ENABLE_BLE 4958 #ifdef ENABLE_LE_CENTRAL 4959 static void hci_emit_le_connection_complete(uint8_t address_type, const bd_addr_t address, hci_con_handle_t con_handle, uint8_t status){ 4960 uint8_t event[21]; 4961 event[0] = HCI_EVENT_LE_META; 4962 event[1] = sizeof(event) - 2u; 4963 event[2] = HCI_SUBEVENT_LE_CONNECTION_COMPLETE; 4964 event[3] = status; 4965 little_endian_store_16(event, 4, con_handle); 4966 event[6] = 0; // TODO: role 4967 event[7] = address_type; 4968 reverse_bd_addr(address, &event[8]); 4969 little_endian_store_16(event, 14, 0); // interval 4970 little_endian_store_16(event, 16, 0); // latency 4971 little_endian_store_16(event, 18, 0); // supervision timeout 4972 event[20] = 0; // master clock accuracy 4973 hci_emit_event(event, sizeof(event), 1); 4974 } 4975 #endif 4976 #endif 4977 4978 static void hci_emit_transport_packet_sent(void){ 4979 // notify upper stack that it might be possible to send again 4980 uint8_t event[] = { HCI_EVENT_TRANSPORT_PACKET_SENT, 0}; 4981 hci_emit_event(&event[0], sizeof(event), 0); // don't dump 4982 } 4983 4984 static void hci_emit_disconnection_complete(hci_con_handle_t con_handle, uint8_t reason){ 4985 uint8_t event[6]; 4986 event[0] = HCI_EVENT_DISCONNECTION_COMPLETE; 4987 event[1] = sizeof(event) - 2u; 4988 event[2] = 0; // status = OK 4989 little_endian_store_16(event, 3, con_handle); 4990 event[5] = reason; 4991 hci_emit_event(event, sizeof(event), 1); 4992 } 4993 4994 static void hci_emit_nr_connections_changed(void){ 4995 log_info("BTSTACK_EVENT_NR_CONNECTIONS_CHANGED %u", nr_hci_connections()); 4996 uint8_t event[3]; 4997 event[0] = BTSTACK_EVENT_NR_CONNECTIONS_CHANGED; 4998 event[1] = sizeof(event) - 2u; 4999 event[2] = nr_hci_connections(); 5000 hci_emit_event(event, sizeof(event), 1); 5001 } 5002 5003 static void hci_emit_hci_open_failed(void){ 5004 log_info("BTSTACK_EVENT_POWERON_FAILED"); 5005 uint8_t event[2]; 5006 event[0] = BTSTACK_EVENT_POWERON_FAILED; 5007 event[1] = sizeof(event) - 2u; 5008 hci_emit_event(event, sizeof(event), 1); 5009 } 5010 5011 static void hci_emit_dedicated_bonding_result(bd_addr_t address, uint8_t status){ 5012 log_info("hci_emit_dedicated_bonding_result %u ", status); 5013 uint8_t event[9]; 5014 int pos = 0; 5015 event[pos++] = GAP_EVENT_DEDICATED_BONDING_COMPLETED; 5016 event[pos++] = sizeof(event) - 2u; 5017 event[pos++] = status; 5018 reverse_bd_addr(address, &event[pos]); 5019 hci_emit_event(event, sizeof(event), 1); 5020 } 5021 5022 5023 #ifdef ENABLE_CLASSIC 5024 5025 static void hci_emit_security_level(hci_con_handle_t con_handle, gap_security_level_t level){ 5026 log_info("hci_emit_security_level %u for handle %x", level, con_handle); 5027 uint8_t event[5]; 5028 int pos = 0; 5029 event[pos++] = GAP_EVENT_SECURITY_LEVEL; 5030 event[pos++] = sizeof(event) - 2; 5031 little_endian_store_16(event, 2, con_handle); 5032 pos += 2; 5033 event[pos++] = level; 5034 hci_emit_event(event, sizeof(event), 1); 5035 } 5036 5037 static gap_security_level_t gap_security_level_for_connection(hci_connection_t * connection){ 5038 if (!connection) return LEVEL_0; 5039 if ((connection->authentication_flags & CONNECTION_ENCRYPTED) == 0) return LEVEL_0; 5040 if ((connection->authentication_flags & CONNECTION_AUTHENTICATED) == 0) return LEVEL_0; 5041 if (connection->encryption_key_size < hci_stack->gap_required_encyrption_key_size) return LEVEL_0; 5042 gap_security_level_t security_level = gap_security_level_for_link_key_type(connection->link_key_type); 5043 // LEVEL 4 always requires 128 bit encrytion key size 5044 if ((security_level == LEVEL_4) && (connection->encryption_key_size < 16)){ 5045 security_level = LEVEL_3; 5046 } 5047 return security_level; 5048 } 5049 5050 static void hci_emit_discoverable_enabled(uint8_t enabled){ 5051 log_info("BTSTACK_EVENT_DISCOVERABLE_ENABLED %u", enabled); 5052 uint8_t event[3]; 5053 event[0] = BTSTACK_EVENT_DISCOVERABLE_ENABLED; 5054 event[1] = sizeof(event) - 2; 5055 event[2] = enabled; 5056 hci_emit_event(event, sizeof(event), 1); 5057 } 5058 5059 // query if remote side supports eSCO 5060 int hci_remote_esco_supported(hci_con_handle_t con_handle){ 5061 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5062 if (!connection) return 0; 5063 return (connection->remote_supported_features[0] & 1) != 0; 5064 } 5065 5066 static bool hci_ssp_supported(hci_connection_t * connection){ 5067 const uint8_t mask = BONDING_REMOTE_SUPPORTS_SSP_CONTROLLER | BONDING_REMOTE_SUPPORTS_SSP_HOST; 5068 return (connection->bonding_flags & mask) == mask; 5069 } 5070 5071 // query if remote side supports SSP 5072 int hci_remote_ssp_supported(hci_con_handle_t con_handle){ 5073 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5074 if (!connection) return 0; 5075 return hci_ssp_supported(connection) ? 1 : 0; 5076 } 5077 5078 int gap_ssp_supported_on_both_sides(hci_con_handle_t handle){ 5079 return hci_local_ssp_activated() && hci_remote_ssp_supported(handle); 5080 } 5081 5082 // GAP API 5083 /** 5084 * @bbrief enable/disable bonding. default is enabled 5085 * @praram enabled 5086 */ 5087 void gap_set_bondable_mode(int enable){ 5088 hci_stack->bondable = enable ? 1 : 0; 5089 } 5090 /** 5091 * @brief Get bondable mode. 5092 * @return 1 if bondable 5093 */ 5094 int gap_get_bondable_mode(void){ 5095 return hci_stack->bondable; 5096 } 5097 5098 /** 5099 * @brief map link keys to security levels 5100 */ 5101 gap_security_level_t gap_security_level_for_link_key_type(link_key_type_t link_key_type){ 5102 switch (link_key_type){ 5103 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5104 return LEVEL_4; 5105 case COMBINATION_KEY: 5106 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5107 return LEVEL_3; 5108 default: 5109 return LEVEL_2; 5110 } 5111 } 5112 5113 /** 5114 * @brief map link keys to secure connection yes/no 5115 */ 5116 int gap_secure_connection_for_link_key_type(link_key_type_t link_key_type){ 5117 switch (link_key_type){ 5118 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5119 case UNAUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5120 return 1; 5121 default: 5122 return 0; 5123 } 5124 } 5125 5126 /** 5127 * @brief map link keys to authenticated 5128 */ 5129 int gap_authenticated_for_link_key_type(link_key_type_t link_key_type){ 5130 switch (link_key_type){ 5131 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P256: 5132 case AUTHENTICATED_COMBINATION_KEY_GENERATED_FROM_P192: 5133 return 1; 5134 default: 5135 return 0; 5136 } 5137 } 5138 5139 int gap_mitm_protection_required_for_security_level(gap_security_level_t level){ 5140 log_info("gap_mitm_protection_required_for_security_level %u", level); 5141 return level > LEVEL_2; 5142 } 5143 5144 /** 5145 * @brief get current security level 5146 */ 5147 gap_security_level_t gap_security_level(hci_con_handle_t con_handle){ 5148 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5149 if (!connection) return LEVEL_0; 5150 return gap_security_level_for_connection(connection); 5151 } 5152 5153 /** 5154 * @brief request connection to device to 5155 * @result GAP_AUTHENTICATION_RESULT 5156 */ 5157 void gap_request_security_level(hci_con_handle_t con_handle, gap_security_level_t requested_level){ 5158 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5159 if (!connection){ 5160 hci_emit_security_level(con_handle, LEVEL_0); 5161 return; 5162 } 5163 5164 btstack_assert(hci_is_le_connection(connection) == false); 5165 5166 gap_security_level_t current_level = gap_security_level(con_handle); 5167 log_info("gap_request_security_level requested level %u, planned level %u, current level %u", 5168 requested_level, connection->requested_security_level, current_level); 5169 5170 // assumption: earlier requested security higher than current level => security request is active 5171 if (current_level < connection->requested_security_level){ 5172 if (connection->requested_security_level < requested_level){ 5173 // increase requested level as new level is higher 5174 5175 // TODO: handle re-authentication when done 5176 5177 connection->requested_security_level = requested_level; 5178 } 5179 return; 5180 } 5181 5182 // no request active, notify if security sufficient 5183 if (requested_level <= current_level){ 5184 hci_emit_security_level(con_handle, current_level); 5185 return; 5186 } 5187 5188 // store request 5189 connection->requested_security_level = requested_level; 5190 5191 // start to authenticate connection if authentication not already active 5192 if ((connection->bonding_flags & BONDING_SENT_AUTHENTICATE_REQUEST) != 0) return; 5193 connection->bonding_flags |= BONDING_SEND_AUTHENTICATE_REQUEST; 5194 hci_run(); 5195 } 5196 5197 /** 5198 * @brief start dedicated bonding with device. disconnect after bonding 5199 * @param device 5200 * @param request MITM protection 5201 * @result GAP_DEDICATED_BONDING_COMPLETE 5202 */ 5203 int gap_dedicated_bonding(bd_addr_t device, int mitm_protection_required){ 5204 5205 // create connection state machine 5206 hci_connection_t * connection = create_connection_for_bd_addr_and_type(device, BD_ADDR_TYPE_ACL); 5207 5208 if (!connection){ 5209 return BTSTACK_MEMORY_ALLOC_FAILED; 5210 } 5211 5212 // delete linkn key 5213 gap_drop_link_key_for_bd_addr(device); 5214 5215 // configure LEVEL_2/3, dedicated bonding 5216 connection->state = SEND_CREATE_CONNECTION; 5217 connection->requested_security_level = mitm_protection_required ? LEVEL_3 : LEVEL_2; 5218 log_info("gap_dedicated_bonding, mitm %d -> level %u", mitm_protection_required, connection->requested_security_level); 5219 connection->bonding_flags = BONDING_DEDICATED; 5220 5221 // wait for GAP Security Result and send GAP Dedicated Bonding complete 5222 5223 // handle: connnection failure (connection complete != ok) 5224 // handle: authentication failure 5225 // handle: disconnect on done 5226 5227 hci_run(); 5228 5229 return 0; 5230 } 5231 #endif 5232 5233 void gap_set_local_name(const char * local_name){ 5234 hci_stack->local_name = local_name; 5235 } 5236 5237 5238 #ifdef ENABLE_BLE 5239 5240 #ifdef ENABLE_LE_CENTRAL 5241 void gap_start_scan(void){ 5242 hci_stack->le_scanning_enabled = true; 5243 hci_run(); 5244 } 5245 5246 void gap_stop_scan(void){ 5247 hci_stack->le_scanning_enabled = false; 5248 hci_run(); 5249 } 5250 5251 void gap_set_scan_params(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window, uint8_t scanning_filter_policy){ 5252 hci_stack->le_scan_type = scan_type; 5253 hci_stack->le_scan_filter_policy = scanning_filter_policy; 5254 hci_stack->le_scan_interval = scan_interval; 5255 hci_stack->le_scan_window = scan_window; 5256 hci_stack->le_scanning_param_update = true; 5257 hci_run(); 5258 } 5259 5260 void gap_set_scan_parameters(uint8_t scan_type, uint16_t scan_interval, uint16_t scan_window){ 5261 gap_set_scan_params(scan_type, scan_interval, scan_window, 0); 5262 } 5263 5264 uint8_t gap_connect(const bd_addr_t addr, bd_addr_type_t addr_type){ 5265 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, addr_type); 5266 if (!conn){ 5267 // disallow if le connection is already outgoing 5268 if (hci_is_le_connection_type(addr_type) && hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5269 log_error("le connection already active"); 5270 return ERROR_CODE_COMMAND_DISALLOWED; 5271 } 5272 5273 log_info("gap_connect: no connection exists yet, creating context"); 5274 conn = create_connection_for_bd_addr_and_type(addr, addr_type); 5275 if (!conn){ 5276 // notify client that alloc failed 5277 hci_emit_le_connection_complete(addr_type, addr, 0, BTSTACK_MEMORY_ALLOC_FAILED); 5278 log_info("gap_connect: failed to alloc hci_connection_t"); 5279 return GATT_CLIENT_NOT_CONNECTED; // don't sent packet to controller 5280 } 5281 5282 // set le connecting state 5283 if (hci_is_le_connection_type(addr_type)){ 5284 hci_stack->le_connecting_request = LE_CONNECTING_DIRECT; 5285 } 5286 5287 conn->state = SEND_CREATE_CONNECTION; 5288 log_info("gap_connect: send create connection next"); 5289 hci_run(); 5290 return ERROR_CODE_SUCCESS; 5291 } 5292 5293 if (!hci_is_le_connection(conn) || 5294 (conn->state == SEND_CREATE_CONNECTION) || 5295 (conn->state == SENT_CREATE_CONNECTION)) { 5296 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_COMMAND_DISALLOWED); 5297 log_error("gap_connect: classic connection or connect is already being created"); 5298 return GATT_CLIENT_IN_WRONG_STATE; 5299 } 5300 5301 // check if connection was just disconnected 5302 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5303 log_info("gap_connect: send create connection (again)"); 5304 conn->state = SEND_CREATE_CONNECTION; 5305 hci_run(); 5306 return ERROR_CODE_SUCCESS; 5307 } 5308 5309 log_info("gap_connect: context exists with state %u", conn->state); 5310 hci_emit_le_connection_complete(conn->address_type, conn->address, conn->con_handle, ERROR_CODE_SUCCESS); 5311 hci_run(); 5312 return ERROR_CODE_SUCCESS; 5313 } 5314 5315 // @assumption: only a single outgoing LE Connection exists 5316 static hci_connection_t * gap_get_outgoing_connection(void){ 5317 btstack_linked_item_t *it; 5318 for (it = (btstack_linked_item_t *) hci_stack->connections; it != NULL; it = it->next){ 5319 hci_connection_t * conn = (hci_connection_t *) it; 5320 if (!hci_is_le_connection(conn)) continue; 5321 switch (conn->state){ 5322 case SEND_CREATE_CONNECTION: 5323 case SENT_CREATE_CONNECTION: 5324 case SENT_CANCEL_CONNECTION: 5325 return conn; 5326 default: 5327 break; 5328 }; 5329 } 5330 return NULL; 5331 } 5332 5333 uint8_t gap_connect_cancel(void){ 5334 hci_connection_t * conn = gap_get_outgoing_connection(); 5335 if (!conn) return 0; 5336 switch (conn->state){ 5337 case SEND_CREATE_CONNECTION: 5338 // skip sending create connection and emit event instead 5339 hci_emit_le_connection_complete(conn->address_type, conn->address, 0, ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER); 5340 btstack_linked_list_remove(&hci_stack->connections, (btstack_linked_item_t *) conn); 5341 btstack_memory_hci_connection_free( conn ); 5342 break; 5343 case SENT_CREATE_CONNECTION: 5344 // request to send cancel connection 5345 conn->state = SEND_CANCEL_CONNECTION; 5346 hci_run(); 5347 break; 5348 default: 5349 break; 5350 } 5351 return 0; 5352 } 5353 #endif 5354 5355 #ifdef ENABLE_LE_CENTRAL 5356 /** 5357 * @brief Set connection parameters for outgoing connections 5358 * @param conn_scan_interval (unit: 0.625 msec), default: 60 ms 5359 * @param conn_scan_window (unit: 0.625 msec), default: 30 ms 5360 * @param conn_interval_min (unit: 1.25ms), default: 10 ms 5361 * @param conn_interval_max (unit: 1.25ms), default: 30 ms 5362 * @param conn_latency, default: 4 5363 * @param supervision_timeout (unit: 10ms), default: 720 ms 5364 * @param min_ce_length (unit: 0.625ms), default: 10 ms 5365 * @param max_ce_length (unit: 0.625ms), default: 30 ms 5366 */ 5367 5368 void gap_set_connection_parameters(uint16_t conn_scan_interval, uint16_t conn_scan_window, 5369 uint16_t conn_interval_min, uint16_t conn_interval_max, uint16_t conn_latency, 5370 uint16_t supervision_timeout, uint16_t min_ce_length, uint16_t max_ce_length){ 5371 hci_stack->le_connection_scan_interval = conn_scan_interval; 5372 hci_stack->le_connection_scan_window = conn_scan_window; 5373 hci_stack->le_connection_interval_min = conn_interval_min; 5374 hci_stack->le_connection_interval_max = conn_interval_max; 5375 hci_stack->le_connection_latency = conn_latency; 5376 hci_stack->le_supervision_timeout = supervision_timeout; 5377 hci_stack->le_minimum_ce_length = min_ce_length; 5378 hci_stack->le_maximum_ce_length = max_ce_length; 5379 } 5380 #endif 5381 5382 /** 5383 * @brief Updates the connection parameters for a given LE connection 5384 * @param handle 5385 * @param conn_interval_min (unit: 1.25ms) 5386 * @param conn_interval_max (unit: 1.25ms) 5387 * @param conn_latency 5388 * @param supervision_timeout (unit: 10ms) 5389 * @returns 0 if ok 5390 */ 5391 int gap_update_connection_parameters(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5392 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5393 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5394 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5395 connection->le_conn_interval_min = conn_interval_min; 5396 connection->le_conn_interval_max = conn_interval_max; 5397 connection->le_conn_latency = conn_latency; 5398 connection->le_supervision_timeout = supervision_timeout; 5399 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_CHANGE_HCI_CON_PARAMETERS; 5400 hci_run(); 5401 return 0; 5402 } 5403 5404 /** 5405 * @brief Request an update of the connection parameter for a given LE connection 5406 * @param handle 5407 * @param conn_interval_min (unit: 1.25ms) 5408 * @param conn_interval_max (unit: 1.25ms) 5409 * @param conn_latency 5410 * @param supervision_timeout (unit: 10ms) 5411 * @returns 0 if ok 5412 */ 5413 int gap_request_connection_parameter_update(hci_con_handle_t con_handle, uint16_t conn_interval_min, 5414 uint16_t conn_interval_max, uint16_t conn_latency, uint16_t supervision_timeout){ 5415 hci_connection_t * connection = hci_connection_for_handle(con_handle); 5416 if (!connection) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5417 connection->le_conn_interval_min = conn_interval_min; 5418 connection->le_conn_interval_max = conn_interval_max; 5419 connection->le_conn_latency = conn_latency; 5420 connection->le_supervision_timeout = supervision_timeout; 5421 connection->le_con_parameter_update_state = CON_PARAMETER_UPDATE_SEND_REQUEST; 5422 uint8_t l2cap_trigger_run_event[2] = { L2CAP_EVENT_TRIGGER_RUN, 0}; 5423 hci_emit_event(l2cap_trigger_run_event, sizeof(l2cap_trigger_run_event), 0); 5424 return 0; 5425 } 5426 5427 #ifdef ENABLE_LE_PERIPHERAL 5428 5429 /** 5430 * @brief Set Advertisement Data 5431 * @param advertising_data_length 5432 * @param advertising_data (max 31 octets) 5433 * @note data is not copied, pointer has to stay valid 5434 */ 5435 void gap_advertisements_set_data(uint8_t advertising_data_length, uint8_t * advertising_data){ 5436 hci_stack->le_advertisements_data_len = advertising_data_length; 5437 hci_stack->le_advertisements_data = advertising_data; 5438 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_ADV_DATA; 5439 hci_run(); 5440 } 5441 5442 /** 5443 * @brief Set Scan Response Data 5444 * @param advertising_data_length 5445 * @param advertising_data (max 31 octets) 5446 * @note data is not copied, pointer has to stay valid 5447 */ 5448 void gap_scan_response_set_data(uint8_t scan_response_data_length, uint8_t * scan_response_data){ 5449 hci_stack->le_scan_response_data_len = scan_response_data_length; 5450 hci_stack->le_scan_response_data = scan_response_data; 5451 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_SCAN_DATA; 5452 hci_run(); 5453 } 5454 5455 /** 5456 * @brief Set Advertisement Parameters 5457 * @param adv_int_min 5458 * @param adv_int_max 5459 * @param adv_type 5460 * @param direct_address_type 5461 * @param direct_address 5462 * @param channel_map 5463 * @param filter_policy 5464 * 5465 * @note internal use. use gap_advertisements_set_params from gap_le.h instead. 5466 */ 5467 void hci_le_advertisements_set_params(uint16_t adv_int_min, uint16_t adv_int_max, uint8_t adv_type, 5468 uint8_t direct_address_typ, bd_addr_t direct_address, 5469 uint8_t channel_map, uint8_t filter_policy) { 5470 5471 hci_stack->le_advertisements_interval_min = adv_int_min; 5472 hci_stack->le_advertisements_interval_max = adv_int_max; 5473 hci_stack->le_advertisements_type = adv_type; 5474 hci_stack->le_advertisements_direct_address_type = direct_address_typ; 5475 hci_stack->le_advertisements_channel_map = channel_map; 5476 hci_stack->le_advertisements_filter_policy = filter_policy; 5477 (void)memcpy(hci_stack->le_advertisements_direct_address, direct_address, 5478 6); 5479 5480 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5481 hci_run(); 5482 } 5483 5484 /** 5485 * @brief Enable/Disable Advertisements 5486 * @param enabled 5487 */ 5488 void gap_advertisements_enable(int enabled){ 5489 hci_stack->le_advertisements_enabled = enabled != 0; 5490 hci_update_advertisements_enabled_for_current_roles(); 5491 hci_run(); 5492 } 5493 5494 #endif 5495 5496 void hci_le_set_own_address_type(uint8_t own_address_type){ 5497 log_info("hci_le_set_own_address_type: old %u, new %u", hci_stack->le_own_addr_type, own_address_type); 5498 if (own_address_type == hci_stack->le_own_addr_type) return; 5499 hci_stack->le_own_addr_type = own_address_type; 5500 5501 #ifdef ENABLE_LE_PERIPHERAL 5502 // update advertisement parameters, too 5503 hci_stack->le_advertisements_todo |= LE_ADVERTISEMENT_TASKS_SET_PARAMS; 5504 hci_run(); 5505 #endif 5506 #ifdef ENABLE_LE_CENTRAL 5507 // note: we don't update scan parameters or modify ongoing connection attempts 5508 #endif 5509 } 5510 5511 #endif 5512 5513 uint8_t gap_disconnect(hci_con_handle_t handle){ 5514 hci_connection_t * conn = hci_connection_for_handle(handle); 5515 if (!conn){ 5516 hci_emit_disconnection_complete(handle, 0); 5517 return 0; 5518 } 5519 // ignore if already disconnected 5520 if (conn->state == RECEIVED_DISCONNECTION_COMPLETE){ 5521 return 0; 5522 } 5523 conn->state = SEND_DISCONNECT; 5524 hci_run(); 5525 return 0; 5526 } 5527 5528 int gap_read_rssi(hci_con_handle_t con_handle){ 5529 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 5530 if (hci_connection == NULL) return 0; 5531 connectionSetAuthenticationFlags(hci_connection, READ_RSSI); 5532 hci_run(); 5533 return 1; 5534 } 5535 5536 /** 5537 * @brief Get connection type 5538 * @param con_handle 5539 * @result connection_type 5540 */ 5541 gap_connection_type_t gap_get_connection_type(hci_con_handle_t connection_handle){ 5542 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5543 if (!conn) return GAP_CONNECTION_INVALID; 5544 switch (conn->address_type){ 5545 case BD_ADDR_TYPE_LE_PUBLIC: 5546 case BD_ADDR_TYPE_LE_RANDOM: 5547 return GAP_CONNECTION_LE; 5548 case BD_ADDR_TYPE_SCO: 5549 return GAP_CONNECTION_SCO; 5550 case BD_ADDR_TYPE_ACL: 5551 return GAP_CONNECTION_ACL; 5552 default: 5553 return GAP_CONNECTION_INVALID; 5554 } 5555 } 5556 5557 hci_role_t gap_get_role(hci_con_handle_t connection_handle){ 5558 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5559 if (!conn) return HCI_ROLE_INVALID; 5560 return (hci_role_t) conn->role; 5561 } 5562 5563 5564 #ifdef ENABLE_CLASSIC 5565 uint8_t gap_request_role(const bd_addr_t addr, hci_role_t role){ 5566 hci_connection_t * conn = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5567 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5568 conn->request_role = role; 5569 hci_run(); 5570 return ERROR_CODE_SUCCESS; 5571 } 5572 #endif 5573 5574 #ifdef ENABLE_BLE 5575 5576 uint8_t gap_le_set_phy(hci_con_handle_t connection_handle, uint8_t all_phys, uint8_t tx_phys, uint8_t rx_phys, uint8_t phy_options){ 5577 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5578 if (!conn) return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5579 5580 conn->le_phy_update_all_phys = all_phys; 5581 conn->le_phy_update_tx_phys = tx_phys; 5582 conn->le_phy_update_rx_phys = rx_phys; 5583 conn->le_phy_update_phy_options = phy_options; 5584 5585 hci_run(); 5586 5587 return 0; 5588 } 5589 5590 static uint8_t hci_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5591 // check if already in list 5592 btstack_linked_list_iterator_t it; 5593 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5594 while (btstack_linked_list_iterator_has_next(&it)) { 5595 whitelist_entry_t *entry = (whitelist_entry_t *) btstack_linked_list_iterator_next(&it); 5596 if (entry->address_type != address_type) { 5597 continue; 5598 } 5599 if (memcmp(entry->address, address, 6) != 0) { 5600 continue; 5601 } 5602 // disallow if already scheduled to add 5603 if ((entry->state & LE_WHITELIST_ADD_TO_CONTROLLER) != 0){ 5604 return ERROR_CODE_COMMAND_DISALLOWED; 5605 } 5606 // still on controller, but scheduled to remove -> re-add 5607 entry->state |= LE_WHITELIST_ADD_TO_CONTROLLER; 5608 return ERROR_CODE_SUCCESS; 5609 } 5610 // alloc and add to list 5611 whitelist_entry_t * entry = btstack_memory_whitelist_entry_get(); 5612 if (!entry) return BTSTACK_MEMORY_ALLOC_FAILED; 5613 entry->address_type = address_type; 5614 (void)memcpy(entry->address, address, 6); 5615 entry->state = LE_WHITELIST_ADD_TO_CONTROLLER; 5616 btstack_linked_list_add(&hci_stack->le_whitelist, (btstack_linked_item_t*) entry); 5617 return ERROR_CODE_SUCCESS; 5618 } 5619 5620 static uint8_t hci_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5621 btstack_linked_list_iterator_t it; 5622 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5623 while (btstack_linked_list_iterator_has_next(&it)){ 5624 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5625 if (entry->address_type != address_type) { 5626 continue; 5627 } 5628 if (memcmp(entry->address, address, 6) != 0) { 5629 continue; 5630 } 5631 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5632 // remove from controller if already present 5633 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5634 } else { 5635 // directly remove entry from whitelist 5636 btstack_linked_list_iterator_remove(&it); 5637 btstack_memory_whitelist_entry_free(entry); 5638 } 5639 return ERROR_CODE_SUCCESS; 5640 } 5641 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5642 } 5643 5644 static void hci_whitelist_clear(void){ 5645 btstack_linked_list_iterator_t it; 5646 btstack_linked_list_iterator_init(&it, &hci_stack->le_whitelist); 5647 while (btstack_linked_list_iterator_has_next(&it)){ 5648 whitelist_entry_t * entry = (whitelist_entry_t*) btstack_linked_list_iterator_next(&it); 5649 if (entry->state & LE_WHITELIST_ON_CONTROLLER){ 5650 // remove from controller if already present 5651 entry->state |= LE_WHITELIST_REMOVE_FROM_CONTROLLER; 5652 continue; 5653 } 5654 // directly remove entry from whitelist 5655 btstack_linked_list_iterator_remove(&it); 5656 btstack_memory_whitelist_entry_free(entry); 5657 } 5658 } 5659 5660 /** 5661 * @brief Clear Whitelist 5662 * @returns 0 if ok 5663 */ 5664 uint8_t gap_whitelist_clear(void){ 5665 hci_whitelist_clear(); 5666 hci_run(); 5667 return ERROR_CODE_SUCCESS; 5668 } 5669 5670 /** 5671 * @brief Add Device to Whitelist 5672 * @param address_typ 5673 * @param address 5674 * @returns 0 if ok 5675 */ 5676 uint8_t gap_whitelist_add(bd_addr_type_t address_type, const bd_addr_t address){ 5677 uint8_t status = hci_whitelist_add(address_type, address); 5678 if (status){ 5679 return status; 5680 } 5681 hci_run(); 5682 return ERROR_CODE_SUCCESS; 5683 } 5684 5685 /** 5686 * @brief Remove Device from Whitelist 5687 * @param address_typ 5688 * @param address 5689 * @returns 0 if ok 5690 */ 5691 uint8_t gap_whitelist_remove(bd_addr_type_t address_type, const bd_addr_t address){ 5692 uint8_t status = hci_whitelist_remove(address_type, address); 5693 if (status){ 5694 return status; 5695 } 5696 hci_run(); 5697 return ERROR_CODE_SUCCESS; 5698 } 5699 5700 #ifdef ENABLE_LE_CENTRAL 5701 /** 5702 * @brief Connect with Whitelist 5703 * @note Explicit whitelist management and this connect with whitelist replace deprecated gap_auto_connection_* functions 5704 * @returns - if ok 5705 */ 5706 uint8_t gap_connect_with_whitelist(void){ 5707 if (hci_stack->le_connecting_request != LE_CONNECTING_IDLE){ 5708 return ERROR_CODE_COMMAND_DISALLOWED; 5709 } 5710 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5711 hci_run(); 5712 return ERROR_CODE_SUCCESS; 5713 } 5714 5715 /** 5716 * @brief Auto Connection Establishment - Start Connecting to device 5717 * @param address_typ 5718 * @param address 5719 * @returns 0 if ok 5720 */ 5721 uint8_t gap_auto_connection_start(bd_addr_type_t address_type, const bd_addr_t address){ 5722 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5723 return ERROR_CODE_COMMAND_DISALLOWED; 5724 } 5725 5726 uint8_t status = hci_whitelist_add(address_type, address); 5727 if (status == BTSTACK_MEMORY_ALLOC_FAILED) { 5728 return status; 5729 } 5730 5731 hci_stack->le_connecting_request = LE_CONNECTING_WHITELIST; 5732 5733 hci_run(); 5734 return ERROR_CODE_SUCCESS; 5735 } 5736 5737 /** 5738 * @brief Auto Connection Establishment - Stop Connecting to device 5739 * @param address_typ 5740 * @param address 5741 * @returns 0 if ok 5742 */ 5743 uint8_t gap_auto_connection_stop(bd_addr_type_t address_type, const bd_addr_t address){ 5744 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT){ 5745 return ERROR_CODE_COMMAND_DISALLOWED; 5746 } 5747 5748 hci_whitelist_remove(address_type, address); 5749 if (btstack_linked_list_empty(&hci_stack->le_whitelist)){ 5750 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5751 } 5752 hci_run(); 5753 return 0; 5754 } 5755 5756 /** 5757 * @brief Auto Connection Establishment - Stop everything 5758 * @note Convenience function to stop all active auto connection attempts 5759 */ 5760 uint8_t gap_auto_connection_stop_all(void){ 5761 if (hci_stack->le_connecting_request == LE_CONNECTING_DIRECT) { 5762 return ERROR_CODE_COMMAND_DISALLOWED; 5763 } 5764 hci_whitelist_clear(); 5765 hci_stack->le_connecting_request = LE_CONNECTING_IDLE; 5766 hci_run(); 5767 return ERROR_CODE_SUCCESS; 5768 } 5769 5770 uint16_t gap_le_connection_interval(hci_con_handle_t connection_handle){ 5771 hci_connection_t * conn = hci_connection_for_handle(connection_handle); 5772 if (!conn) return 0; 5773 return conn->le_connection_interval; 5774 } 5775 #endif 5776 #endif 5777 5778 #ifdef ENABLE_CLASSIC 5779 /** 5780 * @brief Set Extended Inquiry Response data 5781 * @param eir_data size HCI_EXTENDED_INQUIRY_RESPONSE_DATA_LEN (240) bytes, is not copied make sure memory is accessible during stack startup 5782 * @note has to be done before stack starts up 5783 */ 5784 void gap_set_extended_inquiry_response(const uint8_t * data){ 5785 hci_stack->eir_data = data; 5786 } 5787 5788 /** 5789 * @brief Start GAP Classic Inquiry 5790 * @param duration in 1.28s units 5791 * @return 0 if ok 5792 * @events: GAP_EVENT_INQUIRY_RESULT, GAP_EVENT_INQUIRY_COMPLETE 5793 */ 5794 int gap_inquiry_start(uint8_t duration_in_1280ms_units){ 5795 if (hci_stack->state != HCI_STATE_WORKING) return ERROR_CODE_COMMAND_DISALLOWED; 5796 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5797 if ((duration_in_1280ms_units < GAP_INQUIRY_DURATION_MIN) || (duration_in_1280ms_units > GAP_INQUIRY_DURATION_MAX)){ 5798 return ERROR_CODE_INVALID_HCI_COMMAND_PARAMETERS; 5799 } 5800 hci_stack->inquiry_state = duration_in_1280ms_units; 5801 hci_run(); 5802 return 0; 5803 } 5804 5805 /** 5806 * @brief Stop GAP Classic Inquiry 5807 * @returns 0 if ok 5808 */ 5809 int gap_inquiry_stop(void){ 5810 if ((hci_stack->inquiry_state >= GAP_INQUIRY_DURATION_MIN) && (hci_stack->inquiry_state <= GAP_INQUIRY_DURATION_MAX)) { 5811 // emit inquiry complete event, before it even started 5812 uint8_t event[] = { GAP_EVENT_INQUIRY_COMPLETE, 1, 0}; 5813 hci_emit_event(event, sizeof(event), 1); 5814 return 0; 5815 } 5816 if (hci_stack->inquiry_state != GAP_INQUIRY_STATE_ACTIVE) return ERROR_CODE_COMMAND_DISALLOWED; 5817 hci_stack->inquiry_state = GAP_INQUIRY_STATE_W2_CANCEL; 5818 hci_run(); 5819 return 0; 5820 } 5821 5822 5823 /** 5824 * @brief Remote Name Request 5825 * @param addr 5826 * @param page_scan_repetition_mode 5827 * @param clock_offset only used when bit 15 is set 5828 * @events: HCI_EVENT_REMOTE_NAME_REQUEST_COMPLETE 5829 */ 5830 int gap_remote_name_request(const bd_addr_t addr, uint8_t page_scan_repetition_mode, uint16_t clock_offset){ 5831 if (hci_stack->remote_name_state != GAP_REMOTE_NAME_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5832 (void)memcpy(hci_stack->remote_name_addr, addr, 6); 5833 hci_stack->remote_name_page_scan_repetition_mode = page_scan_repetition_mode; 5834 hci_stack->remote_name_clock_offset = clock_offset; 5835 hci_stack->remote_name_state = GAP_REMOTE_NAME_STATE_W2_SEND; 5836 hci_run(); 5837 return 0; 5838 } 5839 5840 static int gap_pairing_set_state_and_run(const bd_addr_t addr, uint8_t state){ 5841 hci_stack->gap_pairing_state = state; 5842 (void)memcpy(hci_stack->gap_pairing_addr, addr, 6); 5843 hci_run(); 5844 return 0; 5845 } 5846 5847 /** 5848 * @brief Legacy Pairing Pin Code Response for binary data / non-strings 5849 * @param addr 5850 * @param pin_data 5851 * @param pin_len 5852 * @return 0 if ok 5853 */ 5854 int gap_pin_code_response_binary(const bd_addr_t addr, const uint8_t * pin_data, uint8_t pin_len){ 5855 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5856 hci_stack->gap_pairing_input.gap_pairing_pin = pin_data; 5857 hci_stack->gap_pairing_pin_len = pin_len; 5858 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN); 5859 } 5860 5861 /** 5862 * @brief Legacy Pairing Pin Code Response 5863 * @param addr 5864 * @param pin 5865 * @return 0 if ok 5866 */ 5867 int gap_pin_code_response(const bd_addr_t addr, const char * pin){ 5868 return gap_pin_code_response_binary(addr, (const uint8_t*) pin, strlen(pin)); 5869 } 5870 5871 /** 5872 * @brief Abort Legacy Pairing 5873 * @param addr 5874 * @param pin 5875 * @return 0 if ok 5876 */ 5877 int gap_pin_code_negative(bd_addr_t addr){ 5878 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5879 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PIN_NEGATIVE); 5880 } 5881 5882 /** 5883 * @brief SSP Passkey Response 5884 * @param addr 5885 * @param passkey 5886 * @return 0 if ok 5887 */ 5888 int gap_ssp_passkey_response(const bd_addr_t addr, uint32_t passkey){ 5889 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5890 hci_stack->gap_pairing_input.gap_pairing_passkey = passkey; 5891 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY); 5892 } 5893 5894 /** 5895 * @brief Abort SSP Passkey Entry/Pairing 5896 * @param addr 5897 * @param pin 5898 * @return 0 if ok 5899 */ 5900 int gap_ssp_passkey_negative(const bd_addr_t addr){ 5901 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5902 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_PASSKEY_NEGATIVE); 5903 } 5904 5905 /** 5906 * @brief Accept SSP Numeric Comparison 5907 * @param addr 5908 * @param passkey 5909 * @return 0 if ok 5910 */ 5911 int gap_ssp_confirmation_response(const bd_addr_t addr){ 5912 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5913 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION); 5914 } 5915 5916 /** 5917 * @brief Abort SSP Numeric Comparison/Pairing 5918 * @param addr 5919 * @param pin 5920 * @return 0 if ok 5921 */ 5922 int gap_ssp_confirmation_negative(const bd_addr_t addr){ 5923 if (hci_stack->gap_pairing_state != GAP_PAIRING_STATE_IDLE) return ERROR_CODE_COMMAND_DISALLOWED; 5924 return gap_pairing_set_state_and_run(addr, GAP_PAIRING_STATE_SEND_CONFIRMATION_NEGATIVE); 5925 } 5926 5927 #ifdef ENABLE_CLASSIC_PAIRING_OOB 5928 /** 5929 * @brief Report Remote OOB Data 5930 * @param bd_addr 5931 * @param c_192 Simple Pairing Hash C derived from P-192 public key 5932 * @param r_192 Simple Pairing Randomizer derived from P-192 public key 5933 * @param c_256 Simple Pairing Hash C derived from P-256 public key 5934 * @param r_256 Simple Pairing Randomizer derived from P-256 public key 5935 */ 5936 uint8_t gap_ssp_remote_oob_data(const bd_addr_t addr, const uint8_t * c_192, const uint8_t * r_192, const uint8_t * c_256, const uint8_t * r_256){ 5937 hci_connection_t * connection = hci_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 5938 if (connection == NULL) { 5939 return ERROR_CODE_UNKNOWN_CONNECTION_IDENTIFIER; 5940 } 5941 connection->classic_oob_c_192 = c_192; 5942 connection->classic_oob_r_192 = r_192; 5943 connection->classic_oob_c_256 = c_256; 5944 connection->classic_oob_r_256 = r_256; 5945 return ERROR_CODE_SUCCESS; 5946 } 5947 #endif 5948 5949 /** 5950 * @brief Set inquiry mode: standard, with RSSI, with RSSI + Extended Inquiry Results. Has to be called before power on. 5951 * @param inquiry_mode see bluetooth_defines.h 5952 */ 5953 void hci_set_inquiry_mode(inquiry_mode_t mode){ 5954 hci_stack->inquiry_mode = mode; 5955 } 5956 5957 /** 5958 * @brief Configure Voice Setting for use with SCO data in HSP/HFP 5959 */ 5960 void hci_set_sco_voice_setting(uint16_t voice_setting){ 5961 hci_stack->sco_voice_setting = voice_setting; 5962 } 5963 5964 /** 5965 * @brief Get SCO Voice Setting 5966 * @return current voice setting 5967 */ 5968 uint16_t hci_get_sco_voice_setting(void){ 5969 return hci_stack->sco_voice_setting; 5970 } 5971 5972 static int hci_have_usb_transport(void){ 5973 if (!hci_stack->hci_transport) return 0; 5974 const char * transport_name = hci_stack->hci_transport->name; 5975 if (!transport_name) return 0; 5976 return (transport_name[0] == 'H') && (transport_name[1] == '2'); 5977 } 5978 5979 /** @brief Get SCO packet length for current SCO Voice setting 5980 * @note Using SCO packets of the exact length is required for USB transfer 5981 * @return Length of SCO packets in bytes (not audio frames) 5982 */ 5983 int hci_get_sco_packet_length(void){ 5984 int sco_packet_length = 0; 5985 5986 #ifdef ENABLE_SCO_OVER_HCI 5987 5988 // Transparent = mSBC => 1, CVSD with 16-bit samples requires twice as much bytes 5989 int multiplier = ((hci_stack->sco_voice_setting_active & 0x03) == 0x03) ? 1 : 2; 5990 5991 if (hci_have_usb_transport()){ 5992 // see Core Spec for H2 USB Transfer. 5993 // 3 byte SCO header + 24 bytes per connection 5994 int num_sco_connections = btstack_max(1, hci_number_sco_connections()); 5995 sco_packet_length = 3 + 24 * num_sco_connections * multiplier; 5996 } else { 5997 // 3 byte SCO header + SCO packet size over the air (60 bytes) 5998 sco_packet_length = 3 + 60 * multiplier; 5999 // assert that it still fits inside an SCO buffer 6000 if (sco_packet_length > hci_stack->sco_data_packet_length){ 6001 sco_packet_length = 3 + 60; 6002 } 6003 } 6004 #endif 6005 return sco_packet_length; 6006 } 6007 6008 /** 6009 * @brief Sets the master/slave policy 6010 * @param policy (0: attempt to become master, 1: let connecting device decide) 6011 */ 6012 void hci_set_master_slave_policy(uint8_t policy){ 6013 hci_stack->master_slave_policy = policy; 6014 } 6015 6016 #endif 6017 6018 HCI_STATE hci_get_state(void){ 6019 return hci_stack->state; 6020 } 6021 6022 #ifdef ENABLE_CLASSIC 6023 void gap_register_classic_connection_filter(int (*accept_callback)(bd_addr_t addr, hci_link_type_t link_type)){ 6024 hci_stack->gap_classic_accept_callback = accept_callback; 6025 } 6026 #endif 6027 6028 /** 6029 * @brief Set callback for Bluetooth Hardware Error 6030 */ 6031 void hci_set_hardware_error_callback(void (*fn)(uint8_t error)){ 6032 hci_stack->hardware_error_callback = fn; 6033 } 6034 6035 void hci_disconnect_all(void){ 6036 btstack_linked_list_iterator_t it; 6037 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6038 while (btstack_linked_list_iterator_has_next(&it)){ 6039 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6040 if (con->state == SENT_DISCONNECT) continue; 6041 con->state = SEND_DISCONNECT; 6042 } 6043 hci_run(); 6044 } 6045 6046 uint16_t hci_get_manufacturer(void){ 6047 return hci_stack->manufacturer; 6048 } 6049 6050 #ifdef ENABLE_BLE 6051 6052 static sm_connection_t * sm_get_connection_for_handle(hci_con_handle_t con_handle){ 6053 hci_connection_t * hci_con = hci_connection_for_handle(con_handle); 6054 if (!hci_con) return NULL; 6055 return &hci_con->sm_connection; 6056 } 6057 6058 // extracted from sm.c to allow enabling of l2cap le data channels without adding sm.c to the build 6059 // without sm.c default values from create_connection_for_bd_addr_and_type() resulg in non-encrypted, not-authenticated 6060 6061 int gap_encryption_key_size(hci_con_handle_t con_handle){ 6062 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6063 if (hci_connection == NULL) return 0; 6064 if (hci_is_le_connection(hci_connection)){ 6065 sm_connection_t * sm_conn = &hci_connection->sm_connection; 6066 if (sm_conn->sm_connection_encrypted) { 6067 return sm_conn->sm_actual_encryption_key_size; 6068 } 6069 } 6070 #ifdef ENABLE_CLASSIC 6071 else { 6072 if ((hci_connection->authentication_flags & CONNECTION_ENCRYPTED)){ 6073 return hci_connection->encryption_key_size; 6074 } 6075 } 6076 #endif 6077 return 0; 6078 } 6079 6080 int gap_authenticated(hci_con_handle_t con_handle){ 6081 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6082 if (hci_connection == NULL) return 0; 6083 6084 switch (hci_connection->address_type){ 6085 case BD_ADDR_TYPE_LE_PUBLIC: 6086 case BD_ADDR_TYPE_LE_RANDOM: 6087 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6088 return hci_connection->sm_connection.sm_connection_authenticated; 6089 #ifdef ENABLE_CLASSIC 6090 case BD_ADDR_TYPE_SCO: 6091 case BD_ADDR_TYPE_ACL: 6092 return gap_authenticated_for_link_key_type(hci_connection->link_key_type); 6093 #endif 6094 default: 6095 return 0; 6096 } 6097 } 6098 6099 int gap_secure_connection(hci_con_handle_t con_handle){ 6100 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6101 if (hci_connection == NULL) return 0; 6102 6103 switch (hci_connection->address_type){ 6104 case BD_ADDR_TYPE_LE_PUBLIC: 6105 case BD_ADDR_TYPE_LE_RANDOM: 6106 if (hci_connection->sm_connection.sm_connection_encrypted == 0) return 0; // unencrypted connection cannot be authenticated 6107 return hci_connection->sm_connection.sm_connection_sc; 6108 #ifdef ENABLE_CLASSIC 6109 case BD_ADDR_TYPE_SCO: 6110 case BD_ADDR_TYPE_ACL: 6111 return gap_secure_connection_for_link_key_type(hci_connection->link_key_type); 6112 #endif 6113 default: 6114 return 0; 6115 } 6116 } 6117 6118 bool gap_bonded(hci_con_handle_t con_handle){ 6119 hci_connection_t * hci_connection = hci_connection_for_handle(con_handle); 6120 if (hci_connection == NULL) return 0; 6121 6122 #ifdef ENABLE_CLASSIC 6123 link_key_t link_key; 6124 link_key_type_t link_key_type; 6125 #endif 6126 switch (hci_connection->address_type){ 6127 case BD_ADDR_TYPE_LE_PUBLIC: 6128 case BD_ADDR_TYPE_LE_RANDOM: 6129 return hci_connection->sm_connection.sm_le_db_index >= 0; 6130 #ifdef ENABLE_CLASSIC 6131 case BD_ADDR_TYPE_SCO: 6132 case BD_ADDR_TYPE_ACL: 6133 return hci_stack->link_key_db && hci_stack->link_key_db->get_link_key(hci_connection->address, link_key, &link_key_type); 6134 #endif 6135 default: 6136 return false; 6137 } 6138 } 6139 6140 6141 authorization_state_t gap_authorization_state(hci_con_handle_t con_handle){ 6142 sm_connection_t * sm_conn = sm_get_connection_for_handle(con_handle); 6143 if (!sm_conn) return AUTHORIZATION_UNKNOWN; // wrong connection 6144 if (!sm_conn->sm_connection_encrypted) return AUTHORIZATION_UNKNOWN; // unencrypted connection cannot be authorized 6145 if (!sm_conn->sm_connection_authenticated) return AUTHORIZATION_UNKNOWN; // unauthenticatd connection cannot be authorized 6146 return sm_conn->sm_connection_authorization_state; 6147 } 6148 #endif 6149 6150 #ifdef ENABLE_CLASSIC 6151 uint8_t gap_sniff_mode_enter(hci_con_handle_t con_handle, uint16_t sniff_min_interval, uint16_t sniff_max_interval, uint16_t sniff_attempt, uint16_t sniff_timeout){ 6152 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6153 if (!conn) return GAP_CONNECTION_INVALID; 6154 conn->sniff_min_interval = sniff_min_interval; 6155 conn->sniff_max_interval = sniff_max_interval; 6156 conn->sniff_attempt = sniff_attempt; 6157 conn->sniff_timeout = sniff_timeout; 6158 hci_run(); 6159 return 0; 6160 } 6161 6162 /** 6163 * @brief Exit Sniff mode 6164 * @param con_handle 6165 @ @return 0 if ok 6166 */ 6167 uint8_t gap_sniff_mode_exit(hci_con_handle_t con_handle){ 6168 hci_connection_t * conn = hci_connection_for_handle(con_handle); 6169 if (!conn) return GAP_CONNECTION_INVALID; 6170 conn->sniff_min_interval = 0xffff; 6171 hci_run(); 6172 return 0; 6173 } 6174 #endif 6175 6176 void hci_halting_defer(void){ 6177 if (hci_stack->state != HCI_STATE_HALTING) return; 6178 switch (hci_stack->substate){ 6179 case HCI_HALTING_DISCONNECT_ALL_NO_TIMER: 6180 case HCI_HALTING_CLOSE: 6181 hci_stack->substate = HCI_HALTING_DISCONNECT_ALL_TIMER; 6182 break; 6183 default: 6184 break; 6185 } 6186 } 6187 6188 #ifdef ENABLE_LE_PRIVACY_ADDRESS_RESOLUTION 6189 void hci_load_le_device_db_entry_into_resolving_list(uint16_t le_device_db_index){ 6190 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6191 if (le_device_db_index >= le_device_db_max_count()) return; 6192 uint8_t offset = le_device_db_index >> 3; 6193 uint8_t mask = 1 << (le_device_db_index & 7); 6194 hci_stack->le_resolving_list_add_entries[offset] |= mask; 6195 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6196 // note: go back to remove entries, otherwise, a remove + add will skip the add 6197 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6198 } 6199 } 6200 6201 void hci_remove_le_device_db_entry_from_resolving_list(uint16_t le_device_db_index){ 6202 if (le_device_db_index >= MAX_NUM_RESOLVING_LIST_ENTRIES) return; 6203 if (le_device_db_index >= le_device_db_max_count()) return; 6204 uint8_t offset = le_device_db_index >> 3; 6205 uint8_t mask = 1 << (le_device_db_index & 7); 6206 hci_stack->le_resolving_list_remove_entries[offset] |= mask; 6207 if (hci_stack->le_resolving_list_state == LE_RESOLVING_LIST_DONE){ 6208 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_REMOVE_ENTRIES; 6209 } 6210 } 6211 6212 uint8_t gap_load_resolving_list_from_le_device_db(void){ 6213 if ((hci_stack->local_supported_commands[1] & (1 << 2)) == 0) { 6214 return ERROR_CODE_UNSUPPORTED_FEATURE_OR_PARAMETER_VALUE; 6215 } 6216 if (hci_stack->le_resolving_list_state != LE_RESOLVING_LIST_SEND_ENABLE_ADDRESS_RESOLUTION){ 6217 // restart le resolving list update 6218 hci_stack->le_resolving_list_state = LE_RESOLVING_LIST_READ_SIZE; 6219 } 6220 return ERROR_CODE_SUCCESS; 6221 } 6222 #endif 6223 6224 #ifdef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION 6225 void hci_setup_test_connections_fuzz(void){ 6226 hci_connection_t * conn; 6227 6228 // default address: 66:55:44:33:00:01 6229 bd_addr_t addr = { 0x66, 0x55, 0x44, 0x33, 0x00, 0x00}; 6230 6231 // setup Controller info 6232 hci_stack->num_cmd_packets = 255; 6233 hci_stack->acl_packets_total_num = 255; 6234 6235 // setup incoming Classic ACL connection with con handle 0x0001, 66:55:44:33:22:01 6236 addr[5] = 0x01; 6237 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6238 conn->con_handle = addr[5]; 6239 conn->role = HCI_ROLE_SLAVE; 6240 conn->state = RECEIVED_CONNECTION_REQUEST; 6241 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6242 6243 // setup incoming Classic SCO connection with con handle 0x0002 6244 addr[5] = 0x02; 6245 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6246 conn->con_handle = addr[5]; 6247 conn->role = HCI_ROLE_SLAVE; 6248 conn->state = RECEIVED_CONNECTION_REQUEST; 6249 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6250 6251 // setup ready Classic ACL connection with con handle 0x0003 6252 addr[5] = 0x03; 6253 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_ACL); 6254 conn->con_handle = addr[5]; 6255 conn->role = HCI_ROLE_SLAVE; 6256 conn->state = OPEN; 6257 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6258 6259 // setup ready Classic SCO connection with con handle 0x0004 6260 addr[5] = 0x04; 6261 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_SCO); 6262 conn->con_handle = addr[5]; 6263 conn->role = HCI_ROLE_SLAVE; 6264 conn->state = OPEN; 6265 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6266 6267 // setup ready LE ACL connection with con handle 0x005 and public address 6268 addr[5] = 0x05; 6269 conn = create_connection_for_bd_addr_and_type(addr, BD_ADDR_TYPE_LE_PUBLIC); 6270 conn->con_handle = addr[5]; 6271 conn->role = HCI_ROLE_SLAVE; 6272 conn->state = OPEN; 6273 conn->sm_connection.sm_role = HCI_ROLE_SLAVE; 6274 } 6275 6276 void hci_free_connections_fuzz(void){ 6277 btstack_linked_list_iterator_t it; 6278 btstack_linked_list_iterator_init(&it, &hci_stack->connections); 6279 while (btstack_linked_list_iterator_has_next(&it)){ 6280 hci_connection_t * con = (hci_connection_t*) btstack_linked_list_iterator_next(&it); 6281 btstack_linked_list_iterator_remove(&it); 6282 btstack_memory_hci_connection_free(con); 6283 } 6284 } 6285 void hci_simulate_working_fuzz(void){ 6286 hci_init_done(); 6287 hci_stack->num_cmd_packets = 255; 6288 } 6289 #endif 6290